diff --git a/src/Mod/Fem/App/AppFem.cpp b/src/Mod/Fem/App/AppFem.cpp
index 5062d958fa..1810ec64d3 100644
--- a/src/Mod/Fem/App/AppFem.cpp
+++ b/src/Mod/Fem/App/AppFem.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <SMESH_Version.h>
 
diff --git a/src/Mod/Fem/App/AppFemPy.cpp b/src/Mod/Fem/App/AppFemPy.cpp
index e6e42f763c..85f8efd7b1 100644
--- a/src/Mod/Fem/App/AppFemPy.cpp
+++ b/src/Mod/Fem/App/AppFemPy.cpp
@@ -20,11 +20,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <cstdlib>
 #include <memory>
-#endif
+
 
 #include <App/Application.h>
 #include <App/Document.h>
diff --git a/src/Mod/Fem/App/CMakeLists.txt b/src/Mod/Fem/App/CMakeLists.txt
index 24329f725e..5dcb7d2a8c 100644
--- a/src/Mod/Fem/App/CMakeLists.txt
+++ b/src/Mod/Fem/App/CMakeLists.txt
@@ -90,7 +90,6 @@ SET(Mod_SRCS
     AppFemPy.cpp
     FemTools.cpp
     FemTools.h
-    PreCompiled.cpp
     PreCompiled.h
 )
 SOURCE_GROUP("Module" FILES ${Mod_SRCS})
@@ -182,14 +181,14 @@ SET(Fem_SRCS
     ${Python_SRCS}
 )
 
-if(FREECAD_USE_PCH)
-    add_definitions(-D_PreComp_)
-    GET_MSVC_PRECOMPILED_SOURCE("PreCompiled.cpp" Fem_CPP_SRCS ${Fem_SRCS})
-    ADD_MSVC_PRECOMPILED_HEADER(Fem PreCompiled.h PreCompiled.cpp Fem_CPP_SRCS)
-endif(FREECAD_USE_PCH)
-
 add_library(Fem SHARED ${Fem_SRCS})
 
+if(FREECAD_USE_PCH)
+    target_precompile_headers(Fem PRIVATE
+            $<$<COMPILE_LANGUAGE:CXX>:"${CMAKE_CURRENT_LIST_DIR}/PreCompiled.h">
+    )
+endif(FREECAD_USE_PCH)
+
 target_include_directories(
     Fem
     PRIVATE
diff --git a/src/Mod/Fem/App/FemAnalysis.cpp b/src/Mod/Fem/App/FemAnalysis.cpp
index a28cbe1317..3fdfa18471 100644
--- a/src/Mod/Fem/App/FemAnalysis.cpp
+++ b/src/Mod/Fem/App/FemAnalysis.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/DocumentObjectPy.h>
 #include <App/FeaturePythonPyImp.h>
diff --git a/src/Mod/Fem/App/FemConstraint.cpp b/src/Mod/Fem/App/FemConstraint.cpp
index 87237513f5..d3b1cbfdaf 100644
--- a/src/Mod/Fem/App/FemConstraint.cpp
+++ b/src/Mod/Fem/App/FemConstraint.cpp
@@ -21,10 +21,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <limits>
+
 #include <Adaptor3d_IsoCurve.hxx>
 #include <BRepAdaptor_CompCurve.hxx>
 #include <BRepAdaptor_Curve.hxx>
@@ -55,7 +53,6 @@
 #include <Adaptor3d_HSurface.hxx>
 #include <BRepAdaptor_HSurface.hxx>
 #endif
-#endif
 
 #include <App/Document.h>
 #include <App/DocumentObjectPy.h>
diff --git a/src/Mod/Fem/App/FemConstraintBearing.cpp b/src/Mod/Fem/App/FemConstraintBearing.cpp
index 3f069846d7..43bb170125 100644
--- a/src/Mod/Fem/App/FemConstraintBearing.cpp
+++ b/src/Mod/Fem/App/FemConstraintBearing.cpp
@@ -21,13 +21,11 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <BRepAdaptor_Curve.hxx>
 #include <BRepAdaptor_Surface.hxx>
 #include <TopoDS.hxx>
-#endif
+
 
 #include <Mod/Part/App/PartFeature.h>
 
diff --git a/src/Mod/Fem/App/FemConstraintContact.cpp b/src/Mod/Fem/App/FemConstraintContact.cpp
index 95f50e3c6c..fabfb4c7b8 100644
--- a/src/Mod/Fem/App/FemConstraintContact.cpp
+++ b/src/Mod/Fem/App/FemConstraintContact.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintContact.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintDisplacement.cpp b/src/Mod/Fem/App/FemConstraintDisplacement.cpp
index 0b6616eea3..36cbb5117a 100644
--- a/src/Mod/Fem/App/FemConstraintDisplacement.cpp
+++ b/src/Mod/Fem/App/FemConstraintDisplacement.cpp
@@ -23,7 +23,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintDisplacement.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintFixed.cpp b/src/Mod/Fem/App/FemConstraintFixed.cpp
index 59db8bc816..198879e807 100644
--- a/src/Mod/Fem/App/FemConstraintFixed.cpp
+++ b/src/Mod/Fem/App/FemConstraintFixed.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintFixed.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintFluidBoundary.cpp b/src/Mod/Fem/App/FemConstraintFluidBoundary.cpp
index 22e3ce377d..ea5a8e3723 100644
--- a/src/Mod/Fem/App/FemConstraintFluidBoundary.cpp
+++ b/src/Mod/Fem/App/FemConstraintFluidBoundary.cpp
@@ -21,11 +21,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Precision.hxx>
-#endif
+
 
 #include <Base/Console.h>
 
diff --git a/src/Mod/Fem/App/FemConstraintForce.cpp b/src/Mod/Fem/App/FemConstraintForce.cpp
index e178906d60..90b717afa8 100644
--- a/src/Mod/Fem/App/FemConstraintForce.cpp
+++ b/src/Mod/Fem/App/FemConstraintForce.cpp
@@ -21,11 +21,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Precision.hxx>
-#endif
+
 
 #include "FemConstraintForce.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintGear.cpp b/src/Mod/Fem/App/FemConstraintGear.cpp
index 1919e2c7b9..11902a33e3 100644
--- a/src/Mod/Fem/App/FemConstraintGear.cpp
+++ b/src/Mod/Fem/App/FemConstraintGear.cpp
@@ -21,11 +21,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Precision.hxx>
-#endif
+
 
 #include "FemConstraintGear.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintHeatflux.cpp b/src/Mod/Fem/App/FemConstraintHeatflux.cpp
index 016bd2272a..9c464f1ab3 100644
--- a/src/Mod/Fem/App/FemConstraintHeatflux.cpp
+++ b/src/Mod/Fem/App/FemConstraintHeatflux.cpp
@@ -22,7 +22,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintHeatflux.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintInitialTemperature.cpp b/src/Mod/Fem/App/FemConstraintInitialTemperature.cpp
index b2d7c12d2d..8eb6c3b751 100644
--- a/src/Mod/Fem/App/FemConstraintInitialTemperature.cpp
+++ b/src/Mod/Fem/App/FemConstraintInitialTemperature.cpp
@@ -23,7 +23,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintInitialTemperature.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintPlaneRotation.cpp b/src/Mod/Fem/App/FemConstraintPlaneRotation.cpp
index 53a884a67e..0ab5f73e39 100644
--- a/src/Mod/Fem/App/FemConstraintPlaneRotation.cpp
+++ b/src/Mod/Fem/App/FemConstraintPlaneRotation.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintPlaneRotation.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintPressure.cpp b/src/Mod/Fem/App/FemConstraintPressure.cpp
index 08395579fb..b098b38cb0 100644
--- a/src/Mod/Fem/App/FemConstraintPressure.cpp
+++ b/src/Mod/Fem/App/FemConstraintPressure.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintPressure.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintPulley.cpp b/src/Mod/Fem/App/FemConstraintPulley.cpp
index d4b136adf4..edadddac47 100644
--- a/src/Mod/Fem/App/FemConstraintPulley.cpp
+++ b/src/Mod/Fem/App/FemConstraintPulley.cpp
@@ -21,11 +21,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Precision.hxx>
-#endif
+
 
 #include "FemConstraintPulley.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintRigidBody.cpp b/src/Mod/Fem/App/FemConstraintRigidBody.cpp
index 77dabe38ef..136849397f 100644
--- a/src/Mod/Fem/App/FemConstraintRigidBody.cpp
+++ b/src/Mod/Fem/App/FemConstraintRigidBody.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintRigidBody.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintSpring.cpp b/src/Mod/Fem/App/FemConstraintSpring.cpp
index 1ce3db58a5..4d375de22d 100644
--- a/src/Mod/Fem/App/FemConstraintSpring.cpp
+++ b/src/Mod/Fem/App/FemConstraintSpring.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintSpring.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintTemperature.cpp b/src/Mod/Fem/App/FemConstraintTemperature.cpp
index a5e33d8d70..5c07b6575f 100644
--- a/src/Mod/Fem/App/FemConstraintTemperature.cpp
+++ b/src/Mod/Fem/App/FemConstraintTemperature.cpp
@@ -23,7 +23,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemConstraintTemperature.h"
 
diff --git a/src/Mod/Fem/App/FemConstraintTransform.cpp b/src/Mod/Fem/App/FemConstraintTransform.cpp
index 83206182b8..3bc81d2cda 100644
--- a/src/Mod/Fem/App/FemConstraintTransform.cpp
+++ b/src/Mod/Fem/App/FemConstraintTransform.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Base/Tools.h>
 #include <Mod/Part/App/PartFeature.h>
diff --git a/src/Mod/Fem/App/FemMesh.cpp b/src/Mod/Fem/App/FemMesh.cpp
index 7306b465d3..52e0ed8fa0 100644
--- a/src/Mod/Fem/App/FemMesh.cpp
+++ b/src/Mod/Fem/App/FemMesh.cpp
@@ -20,9 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <Python.h>
 #include <cstdlib>
 #include <memory>
@@ -58,7 +55,6 @@
 
 #include <boost/assign/list_of.hpp>
 #include <boost/tokenizer.hpp>  //to simplify parsing input files we use the boost lib
-#endif
 
 #include <App/Application.h>
 #include <Base/Console.h>
diff --git a/src/Mod/Fem/App/FemMeshObject.cpp b/src/Mod/Fem/App/FemMeshObject.cpp
index a5a7077171..bf6571d7ee 100644
--- a/src/Mod/Fem/App/FemMeshObject.cpp
+++ b/src/Mod/Fem/App/FemMeshObject.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/FeaturePythonPyImp.h>
 #include <App/GeoFeaturePy.h>
diff --git a/src/Mod/Fem/App/FemMeshProperty.cpp b/src/Mod/Fem/App/FemMeshProperty.cpp
index d4721bc7c3..eef42ec497 100644
--- a/src/Mod/Fem/App/FemMeshProperty.cpp
+++ b/src/Mod/Fem/App/FemMeshProperty.cpp
@@ -20,11 +20,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <sstream>
-#endif
+
 
 #include <Base/PlacementPy.h>
 #include <Base/Reader.h>
diff --git a/src/Mod/Fem/App/FemMeshPyImp.cpp b/src/Mod/Fem/App/FemMeshPyImp.cpp
index 6ff72e5bc0..c4450193b4 100644
--- a/src/Mod/Fem/App/FemMeshPyImp.cpp
+++ b/src/Mod/Fem/App/FemMeshPyImp.cpp
@@ -20,9 +20,7 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Python.h>
 #include <SMDSAbs_ElementType.hxx>
 #include <SMDS_MeshElement.hxx>
@@ -35,7 +33,7 @@
 #include <TopoDS_Shape.hxx>
 #include <algorithm>
 #include <stdexcept>
-#endif
+
 
 #include "Mod/Fem/App/FemMesh.h"
 #include <Base/PlacementPy.h>
diff --git a/src/Mod/Fem/App/FemMeshShapeNetgenObject.cpp b/src/Mod/Fem/App/FemMeshShapeNetgenObject.cpp
index 9ed4f67874..96353d19d3 100644
--- a/src/Mod/Fem/App/FemMeshShapeNetgenObject.cpp
+++ b/src/Mod/Fem/App/FemMeshShapeNetgenObject.cpp
@@ -20,10 +20,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 #include <SMESH_Version.h>
 
-#ifndef _PreComp_
 #include <Python.h>
 #include <SMESHDS_Mesh.hxx>
 #include <SMESH_Mesh.hxx>
@@ -32,7 +30,6 @@
 #include <NETGENPlugin_Hypothesis.hxx>
 #include <NETGENPlugin_Mesher.hxx>
 #endif
-#endif
 
 #include <App/DocumentObjectPy.h>
 #include <Base/Console.h>
diff --git a/src/Mod/Fem/App/FemMeshShapeObject.cpp b/src/Mod/Fem/App/FemMeshShapeObject.cpp
index 281c524d8c..511f2c2502 100644
--- a/src/Mod/Fem/App/FemMeshShapeObject.cpp
+++ b/src/Mod/Fem/App/FemMeshShapeObject.cpp
@@ -20,11 +20,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <SMESH_Mesh.hxx>
-#endif
+
 
 #include <App/FeaturePythonPyImp.h>
 #include <App/GeoFeaturePy.h>
diff --git a/src/Mod/Fem/App/FemPostBranchFilter.cpp b/src/Mod/Fem/App/FemPostBranchFilter.cpp
index 9f0cccc3ac..b969c5099a 100644
--- a/src/Mod/Fem/App/FemPostBranchFilter.cpp
+++ b/src/Mod/Fem/App/FemPostBranchFilter.cpp
@@ -20,11 +20,7 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <Python.h>
-#endif
 
 #include "FemPostBranchFilter.h"
 #include "FemPostBranchFilterPy.h"
diff --git a/src/Mod/Fem/App/FemPostBranchFilterPyImp.cpp b/src/Mod/Fem/App/FemPostBranchFilterPyImp.cpp
index 7991b33d9b..3a0beee3ab 100644
--- a/src/Mod/Fem/App/FemPostBranchFilterPyImp.cpp
+++ b/src/Mod/Fem/App/FemPostBranchFilterPyImp.cpp
@@ -20,10 +20,7 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <Python.h>
-#endif
 
 // clang-format off
 #include "FemPostBranchFilter.h"
diff --git a/src/Mod/Fem/App/FemPostFilter.cpp b/src/Mod/Fem/App/FemPostFilter.cpp
index 932a3d01fe..cf7c0377d3 100644
--- a/src/Mod/Fem/App/FemPostFilter.cpp
+++ b/src/Mod/Fem/App/FemPostFilter.cpp
@@ -20,9 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <Python.h>
 #include <vtkDoubleArray.h>
 #include <vtkPointData.h>
@@ -30,7 +27,6 @@
 #include <vtkAlgorithmOutput.h>
 #include <vtkUnstructuredGrid.h>
 #include <vtkInformation.h>
-#endif
 
 #include <App/FeaturePythonPyImp.h>
 #include <App/Document.h>
diff --git a/src/Mod/Fem/App/FemPostFilterPyImp.cpp b/src/Mod/Fem/App/FemPostFilterPyImp.cpp
index 69a5d8f23e..3b27e3bf2d 100644
--- a/src/Mod/Fem/App/FemPostFilterPyImp.cpp
+++ b/src/Mod/Fem/App/FemPostFilterPyImp.cpp
@@ -20,10 +20,7 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <Python.h>
-#endif
 
 #include <Base/FileInfo.h>
 #include <Base/UnitPy.h>
diff --git a/src/Mod/Fem/App/FemPostFunction.cpp b/src/Mod/Fem/App/FemPostFunction.cpp
index 4aeae3a476..87c0f20321 100644
--- a/src/Mod/Fem/App/FemPostFunction.cpp
+++ b/src/Mod/Fem/App/FemPostFunction.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemPostFunction.h"
 #include <App/Document.h>
diff --git a/src/Mod/Fem/App/FemPostGroupExtension.cpp b/src/Mod/Fem/App/FemPostGroupExtension.cpp
index d7f8771c97..ad3e3864cb 100644
--- a/src/Mod/Fem/App/FemPostGroupExtension.cpp
+++ b/src/Mod/Fem/App/FemPostGroupExtension.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 #include "FemPostGroupExtension.h"
 #include <App/Document.h>
 
diff --git a/src/Mod/Fem/App/FemPostObject.cpp b/src/Mod/Fem/App/FemPostObject.cpp
index 52cd137233..e2b45dd6d8 100644
--- a/src/Mod/Fem/App/FemPostObject.cpp
+++ b/src/Mod/Fem/App/FemPostObject.cpp
@@ -20,14 +20,10 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <vtkDataSet.h>
 #include <vtkXMLDataSetWriter.h>
 #include <vtkXMLMultiBlockDataWriter.h>
 #include <vtkTransform.h>
-#endif
 
 #include <Base/Exception.h>
 
diff --git a/src/Mod/Fem/App/FemPostObjectPyImp.cpp b/src/Mod/Fem/App/FemPostObjectPyImp.cpp
index 8b242abcf7..50cd7184d9 100644
--- a/src/Mod/Fem/App/FemPostObjectPyImp.cpp
+++ b/src/Mod/Fem/App/FemPostObjectPyImp.cpp
@@ -21,10 +21,8 @@
  *                                                                         *
  **************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <Python.h>
-#endif
+
 
 #include "FemPostObjectPy.h"
 #include "FemPostObjectPy.cpp"
diff --git a/src/Mod/Fem/App/FemPostPipeline.cpp b/src/Mod/Fem/App/FemPostPipeline.cpp
index 70697e5bfe..6e950742c8 100644
--- a/src/Mod/Fem/App/FemPostPipeline.cpp
+++ b/src/Mod/Fem/App/FemPostPipeline.cpp
@@ -20,10 +20,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <cmath>
+
 #include <Python.h>
 #include <vtkAppendFilter.h>
 #include <vtkDataSetReader.h>
@@ -45,7 +43,6 @@
 #include <vtkStringArray.h>
 #include <vtkInformation.h>
 #include <vtkInformationVector.h>
-#endif
 
 #include <Base/Console.h>
 
diff --git a/src/Mod/Fem/App/FemPostPipelinePyImp.cpp b/src/Mod/Fem/App/FemPostPipelinePyImp.cpp
index 2c493074e6..556a0ca5f5 100644
--- a/src/Mod/Fem/App/FemPostPipelinePyImp.cpp
+++ b/src/Mod/Fem/App/FemPostPipelinePyImp.cpp
@@ -20,10 +20,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <Python.h>
-#endif
+
 
 #include <Base/FileInfo.h>
 #include <Base/UnitPy.h>
diff --git a/src/Mod/Fem/App/FemResultObject.cpp b/src/Mod/Fem/App/FemResultObject.cpp
index f14d561252..b8e5be8773 100644
--- a/src/Mod/Fem/App/FemResultObject.cpp
+++ b/src/Mod/Fem/App/FemResultObject.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/DocumentObjectPy.h>
 #include <App/FeaturePythonPyImp.h>
diff --git a/src/Mod/Fem/App/FemSetElementNodesObject.cpp b/src/Mod/Fem/App/FemSetElementNodesObject.cpp
index 60a659d159..a33fa3275c 100644
--- a/src/Mod/Fem/App/FemSetElementNodesObject.cpp
+++ b/src/Mod/Fem/App/FemSetElementNodesObject.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/DocumentObjectPy.h>
 
diff --git a/src/Mod/Fem/App/FemSetElementsObject.cpp b/src/Mod/Fem/App/FemSetElementsObject.cpp
index ed2c321138..27de905412 100644
--- a/src/Mod/Fem/App/FemSetElementsObject.cpp
+++ b/src/Mod/Fem/App/FemSetElementsObject.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/DocumentObjectPy.h>
 
diff --git a/src/Mod/Fem/App/FemSetFacesObject.cpp b/src/Mod/Fem/App/FemSetFacesObject.cpp
index c8d6816150..8095712e10 100644
--- a/src/Mod/Fem/App/FemSetFacesObject.cpp
+++ b/src/Mod/Fem/App/FemSetFacesObject.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/DocumentObjectPy.h>
 
diff --git a/src/Mod/Fem/App/FemSetGeometryObject.cpp b/src/Mod/Fem/App/FemSetGeometryObject.cpp
index 55025bf087..383111f643 100644
--- a/src/Mod/Fem/App/FemSetGeometryObject.cpp
+++ b/src/Mod/Fem/App/FemSetGeometryObject.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemSetGeometryObject.h"
 #include <App/DocumentObjectPy.h>
diff --git a/src/Mod/Fem/App/FemSetNodesObject.cpp b/src/Mod/Fem/App/FemSetNodesObject.cpp
index 467acf402d..831c28eb6d 100644
--- a/src/Mod/Fem/App/FemSetNodesObject.cpp
+++ b/src/Mod/Fem/App/FemSetNodesObject.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/DocumentObjectPy.h>
 
diff --git a/src/Mod/Fem/App/FemSetObject.cpp b/src/Mod/Fem/App/FemSetObject.cpp
index 05ee5f2648..600776a700 100644
--- a/src/Mod/Fem/App/FemSetObject.cpp
+++ b/src/Mod/Fem/App/FemSetObject.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "FemSetObject.h"
 #include <App/DocumentObjectPy.h>
diff --git a/src/Mod/Fem/App/FemSolverObject.cpp b/src/Mod/Fem/App/FemSolverObject.cpp
index eb8876c6b6..5c22db9cbe 100644
--- a/src/Mod/Fem/App/FemSolverObject.cpp
+++ b/src/Mod/Fem/App/FemSolverObject.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/DocumentObjectPy.h>
 #include <App/FeaturePythonPyImp.h>
diff --git a/src/Mod/Fem/App/FemTools.cpp b/src/Mod/Fem/App/FemTools.cpp
index fedbe2fe8f..db907ca795 100644
--- a/src/Mod/Fem/App/FemTools.cpp
+++ b/src/Mod/Fem/App/FemTools.cpp
@@ -20,9 +20,7 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QStandardPaths>
 #include <QStringList>
 
@@ -45,7 +43,6 @@
 #include <gp_Lin.hxx>
 #include <gp_Pln.hxx>
 #include <gp_Vec.hxx>
-#endif
 
 #include <App/Application.h>
 #include <Mod/Part/App/PartFeature.h>
diff --git a/src/Mod/Fem/App/FemVTKTools.cpp b/src/Mod/Fem/App/FemVTKTools.cpp
index d17b0b590a..27ee263450 100644
--- a/src/Mod/Fem/App/FemVTKTools.cpp
+++ b/src/Mod/Fem/App/FemVTKTools.cpp
@@ -21,9 +21,7 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Python.h>
 #include <charconv>
 #include <cmath>
@@ -64,7 +62,6 @@
 #include <vtkXMLPUnstructuredGridReader.h>
 #include <vtkXMLUnstructuredGridReader.h>
 #include <vtkXMLUnstructuredGridWriter.h>
-#endif
 
 #include <App/Application.h>
 #include <App/Document.h>
diff --git a/src/Mod/Fem/App/HypothesisPy.cpp b/src/Mod/Fem/App/HypothesisPy.cpp
index d61826e411..b1a9ace15d 100644
--- a/src/Mod/Fem/App/HypothesisPy.cpp
+++ b/src/Mod/Fem/App/HypothesisPy.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 // HypothesisPy.h must be included as first file to avoid compiler warning,
 // see: https://forum.freecad.org/viewtopic.php?p=633192#p633192
@@ -28,7 +27,6 @@
 
 #include <SMESH_Version.h>  // needed for SMESH_VERSION_MAJOR
 
-#ifndef _PreComp_
 #include <StdMeshers_Arithmetic1D.hxx>
 #include <StdMeshers_AutomaticLength.hxx>
 #include <StdMeshers_CompositeSegment_1D.hxx>
@@ -63,7 +61,6 @@
 #include <StdMeshers_StartEndLength.hxx>
 #include <StdMeshers_UseExisting_1D2D.hxx>
 #include <sstream>
-#endif
 
 #include <Base/Interpreter.h>
 #include <Mod/Part/App/TopoShapePy.h>
diff --git a/src/Mod/Fem/App/PreCompiled.cpp b/src/Mod/Fem/App/PreCompiled.cpp
deleted file mode 100644
index 063d004cc0..0000000000
--- a/src/Mod/Fem/App/PreCompiled.cpp
+++ /dev/null
@@ -1,24 +0,0 @@
-/***************************************************************************
- *   Copyright (c) 2008 Jürgen Riegel <juergen.riegel@web.de>              *
- *                                                                         *
- *   This file is part of the FreeCAD CAx development system.              *
- *                                                                         *
- *   This library is free software; you can redistribute it and/or         *
- *   modify it under the terms of the GNU Library General Public           *
- *   License as published by the Free Software Foundation; either          *
- *   version 2 of the License, or (at your option) any later version.      *
- *                                                                         *
- *   This library  is distributed in the hope that it will be useful,      *
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
- *   GNU Library General Public License for more details.                  *
- *                                                                         *
- *   You should have received a copy of the GNU Library General Public     *
- *   License along with this library; see the file COPYING.LIB. If not,    *
- *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
- *   Suite 330, Boston, MA  02111-1307, USA                                *
- *                                                                         *
- ***************************************************************************/
-
-
-#include "PreCompiled.h"
diff --git a/src/Mod/Fem/App/PreCompiled.h b/src/Mod/Fem/App/PreCompiled.h
index 4df4b93e63..4d21076b1c 100644
--- a/src/Mod/Fem/App/PreCompiled.h
+++ b/src/Mod/Fem/App/PreCompiled.h
@@ -25,8 +25,6 @@
 
 #include <FCConfig.h>
 
-#ifdef _PreComp_
-
 // standard
 #include <algorithm>
 #include <bitset>
@@ -56,7 +54,6 @@
 #include <SMDS_MeshElement.hxx>
 #include <SMDS_MeshGroup.hxx>
 #include <SMDS_MeshNode.hxx>
-#include <SMDS_PolyhedralVolumeOfNodes.hxx>
 #include <SMESHDS_Group.hxx>
 #include <SMESHDS_GroupBase.hxx>
 #include <SMESHDS_Mesh.hxx>
@@ -101,6 +98,8 @@
 #include <StdMeshers_UseExisting_1D2D.hxx>
 
 // Opencascade
+#include <Standard_Version.hxx>
+
 #include <Adaptor3d_IsoCurve.hxx>
 #include <BRepAdaptor_CompCurve.hxx>
 #include <BRepAdaptor_Curve.hxx>
@@ -133,7 +132,6 @@
 #include <ShapeAnalysis_ShapeTolerance.hxx>
 #include <ShapeAnalysis_Surface.hxx>
 #include <Standard_Real.hxx>
-#include <Standard_Version.hxx>
 #include <TColgp_Array2OfPnt.hxx>
 #include <TopoDS.hxx>
 #include <TopoDS_Edge.hxx>
@@ -208,5 +206,4 @@
 #include <NETGENPlugin_SimpleHypothesis_3D.hxx>
 #endif
 
-#endif  // _PreComp_
 #endif
diff --git a/src/Mod/Fem/App/PropertyPostDataObject.cpp b/src/Mod/Fem/App/PropertyPostDataObject.cpp
index 83648350ad..593058aa14 100644
--- a/src/Mod/Fem/App/PropertyPostDataObject.cpp
+++ b/src/Mod/Fem/App/PropertyPostDataObject.cpp
@@ -20,9 +20,7 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Python.h>
 #include <vtkCompositeDataSet.h>
 #include <vtkMultiBlockDataSet.h>
@@ -43,7 +41,7 @@
 #include <vtkXMLRectilinearGridReader.h>
 #include <vtkXMLStructuredGridReader.h>
 #include <vtkXMLUnstructuredGridReader.h>
-#endif
+
 
 #ifdef FC_USE_VTK_PYTHON
 #include <vtkPythonUtil.h>
diff --git a/src/Mod/Fem/Gui/AbaqusHighlighter.cpp b/src/Mod/Fem/Gui/AbaqusHighlighter.cpp
index 3465c6e766..d22b67f5cd 100644
--- a/src/Mod/Fem/Gui/AbaqusHighlighter.cpp
+++ b/src/Mod/Fem/Gui/AbaqusHighlighter.cpp
@@ -20,10 +20,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QTextCharFormat>
-#endif
+
 
 #include "AbaqusHighlighter.h"
 
diff --git a/src/Mod/Fem/Gui/ActiveAnalysisObserver.cpp b/src/Mod/Fem/Gui/ActiveAnalysisObserver.cpp
index f91a693d5a..5bcde0bccc 100644
--- a/src/Mod/Fem/Gui/ActiveAnalysisObserver.cpp
+++ b/src/Mod/Fem/Gui/ActiveAnalysisObserver.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Gui/Application.h>
 #include <Gui/Document.h>
diff --git a/src/Mod/Fem/Gui/AppFemGui.cpp b/src/Mod/Fem/Gui/AppFemGui.cpp
index 10d0d1fb66..6e973d69ce 100644
--- a/src/Mod/Fem/Gui/AppFemGui.cpp
+++ b/src/Mod/Fem/Gui/AppFemGui.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Base/Console.h>
 #include <Base/PyObjectBase.h>
diff --git a/src/Mod/Fem/Gui/AppFemGuiPy.cpp b/src/Mod/Fem/Gui/AppFemGuiPy.cpp
index e446ac45d9..da92308754 100644
--- a/src/Mod/Fem/Gui/AppFemGuiPy.cpp
+++ b/src/Mod/Fem/Gui/AppFemGuiPy.cpp
@@ -20,10 +20,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QFileInfo>
-#endif
+
 
 #include <App/DocumentObjectPy.h>
 #include <Gui/BitmapFactory.h>
diff --git a/src/Mod/Fem/Gui/CMakeLists.txt b/src/Mod/Fem/Gui/CMakeLists.txt
index 7593638c71..74c7a339a4 100755
--- a/src/Mod/Fem/Gui/CMakeLists.txt
+++ b/src/Mod/Fem/Gui/CMakeLists.txt
@@ -318,7 +318,6 @@ SET(FemGui_SRCS_Module
     FemSettings.cpp
     FemSettings.h
     Resources/Fem.qrc
-    PreCompiled.cpp
     PreCompiled.h
     PropertyFemMeshItem.cpp
     PropertyFemMeshItem.h
@@ -355,12 +354,6 @@ SET(FemGui_SRCS
     ${FemGui_SRCS_Post}
 )
 
-if(FREECAD_USE_PCH)
-    add_definitions(-D_PreComp_)
-    GET_MSVC_PRECOMPILED_SOURCE("PreCompiled.cpp" PCH_SRCS ${FemGui_SRCS})
-    ADD_MSVC_PRECOMPILED_HEADER(FemGui PreCompiled.h PreCompiled.cpp PCH_SRCS)
-endif(FREECAD_USE_PCH)
-
 SET(FemGuiIcon_SVG
     Resources/icons/FemWorkbench.svg
 )
@@ -386,6 +379,12 @@ SET(FemGuiSymbol_IV
 
 add_library(FemGui SHARED ${FemGui_SRCS} ${FemGuiIcon_SVG} ${FemGuiSymbol_IV})
 
+if(FREECAD_USE_PCH)
+    target_precompile_headers(FemGui PRIVATE
+            $<$<COMPILE_LANGUAGE:CXX>:"${CMAKE_CURRENT_LIST_DIR}/PreCompiled.h">
+    )
+endif(FREECAD_USE_PCH)
+
 target_include_directories(
     FemGui
     PRIVATE
diff --git a/src/Mod/Fem/Gui/Command.cpp b/src/Mod/Fem/Gui/Command.cpp
index 5ccff8f7f2..a18f1dc3ce 100644
--- a/src/Mod/Fem/Gui/Command.cpp
+++ b/src/Mod/Fem/Gui/Command.cpp
@@ -21,8 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <Inventor/events/SoMouseButtonEvent.h>
 #include <Inventor/nodes/SoCamera.h>
 #include <Inventor/nodes/SoEventCallback.h>
@@ -31,7 +29,7 @@
 #include <QMessageBox>
 #include <SMESHDS_Mesh.hxx>
 #include <SMESH_Mesh.hxx>
-#endif
+
 
 #include <App/Document.h>
 #include <App/DocumentObserver.h>
diff --git a/src/Mod/Fem/Gui/DlgSettingsFemCcxImp.cpp b/src/Mod/Fem/Gui/DlgSettingsFemCcxImp.cpp
index 8ef54f9c31..ea1bb29c01 100644
--- a/src/Mod/Fem/Gui/DlgSettingsFemCcxImp.cpp
+++ b/src/Mod/Fem/Gui/DlgSettingsFemCcxImp.cpp
@@ -23,12 +23,10 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QMessageBox>
 #include <QStandardPaths>
 #include <QThread>
-#endif
+
 
 #include <App/Application.h>
 
diff --git a/src/Mod/Fem/Gui/DlgSettingsFemElmerImp.cpp b/src/Mod/Fem/Gui/DlgSettingsFemElmerImp.cpp
index a40fa3c9b7..fc5e7a6003 100644
--- a/src/Mod/Fem/Gui/DlgSettingsFemElmerImp.cpp
+++ b/src/Mod/Fem/Gui/DlgSettingsFemElmerImp.cpp
@@ -22,11 +22,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QMessageBox>
 #include <QStandardPaths>
-#endif
 
 #include "DlgSettingsFemElmerImp.h"
 #include "ui_DlgSettingsFemElmer.h"
diff --git a/src/Mod/Fem/Gui/DlgSettingsFemExportAbaqusImp.cpp b/src/Mod/Fem/Gui/DlgSettingsFemExportAbaqusImp.cpp
index 271d613cae..5247f22777 100644
--- a/src/Mod/Fem/Gui/DlgSettingsFemExportAbaqusImp.cpp
+++ b/src/Mod/Fem/Gui/DlgSettingsFemExportAbaqusImp.cpp
@@ -22,7 +22,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Gui/Application.h>
 
diff --git a/src/Mod/Fem/Gui/DlgSettingsFemGeneralImp.cpp b/src/Mod/Fem/Gui/DlgSettingsFemGeneralImp.cpp
index 1d6182261d..3e9954ca9d 100644
--- a/src/Mod/Fem/Gui/DlgSettingsFemGeneralImp.cpp
+++ b/src/Mod/Fem/Gui/DlgSettingsFemGeneralImp.cpp
@@ -22,7 +22,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/Application.h>
 #include <Mod/Fem/App/FemTools.h>
diff --git a/src/Mod/Fem/Gui/DlgSettingsFemGmshImp.cpp b/src/Mod/Fem/Gui/DlgSettingsFemGmshImp.cpp
index dc907b8340..e39a165d6e 100644
--- a/src/Mod/Fem/Gui/DlgSettingsFemGmshImp.cpp
+++ b/src/Mod/Fem/Gui/DlgSettingsFemGmshImp.cpp
@@ -22,12 +22,10 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QMessageBox>
 #include <QStandardPaths>
 #include <QThread>
-#endif
+
 
 #include <App/Application.h>
 #include "DlgSettingsFemGmshImp.h"
diff --git a/src/Mod/Fem/Gui/DlgSettingsFemInOutVtkImp.cpp b/src/Mod/Fem/Gui/DlgSettingsFemInOutVtkImp.cpp
index 9d6f21d934..975c1f7f10 100644
--- a/src/Mod/Fem/Gui/DlgSettingsFemInOutVtkImp.cpp
+++ b/src/Mod/Fem/Gui/DlgSettingsFemInOutVtkImp.cpp
@@ -22,7 +22,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Gui/Application.h>
 
diff --git a/src/Mod/Fem/Gui/DlgSettingsFemMystranImp.cpp b/src/Mod/Fem/Gui/DlgSettingsFemMystranImp.cpp
index e7692a00de..93c383e3ad 100644
--- a/src/Mod/Fem/Gui/DlgSettingsFemMystranImp.cpp
+++ b/src/Mod/Fem/Gui/DlgSettingsFemMystranImp.cpp
@@ -22,11 +22,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QMessageBox>
 #include <QStandardPaths>
-#endif
 
 #include "DlgSettingsFemMystranImp.h"
 #include "ui_DlgSettingsFemMystran.h"
diff --git a/src/Mod/Fem/Gui/DlgSettingsFemZ88Imp.cpp b/src/Mod/Fem/Gui/DlgSettingsFemZ88Imp.cpp
index ddbd2b7b8d..8e4f6698d5 100644
--- a/src/Mod/Fem/Gui/DlgSettingsFemZ88Imp.cpp
+++ b/src/Mod/Fem/Gui/DlgSettingsFemZ88Imp.cpp
@@ -22,11 +22,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QMessageBox>
 #include <QStandardPaths>
-#endif
 
 #include <Gui/Application.h>
 
diff --git a/src/Mod/Fem/Gui/FemGuiTools.cpp b/src/Mod/Fem/Gui/FemGuiTools.cpp
index cf6d66ec62..5f6c5f688c 100644
--- a/src/Mod/Fem/Gui/FemGuiTools.cpp
+++ b/src/Mod/Fem/Gui/FemGuiTools.cpp
@@ -21,16 +21,14 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/nodes/SoCone.h>
 #include <Inventor/nodes/SoCube.h>
 #include <Inventor/nodes/SoCylinder.h>
 #include <Inventor/nodes/SoTranslation.h>
 #include <Inventor/nodes/SoSeparator.h>
 #include <Inventor/nodes/SoRotation.h>
-#endif
+
 
 #include "FemGuiTools.h"
 
diff --git a/src/Mod/Fem/Gui/FemSelectionGate.cpp b/src/Mod/Fem/Gui/FemSelectionGate.cpp
index afe4d48c9d..4cf0caa477 100644
--- a/src/Mod/Fem/Gui/FemSelectionGate.cpp
+++ b/src/Mod/Fem/Gui/FemSelectionGate.cpp
@@ -20,7 +20,6 @@
  *                                                                            *
  ******************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Base/Tools.h>
 
diff --git a/src/Mod/Fem/Gui/FemSettings.cpp b/src/Mod/Fem/Gui/FemSettings.cpp
index a8f6fb350f..15c66c0ca1 100644
--- a/src/Mod/Fem/Gui/FemSettings.cpp
+++ b/src/Mod/Fem/Gui/FemSettings.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <App/Application.h>
 
diff --git a/src/Mod/Fem/Gui/PreCompiled.cpp b/src/Mod/Fem/Gui/PreCompiled.cpp
deleted file mode 100644
index 063d004cc0..0000000000
--- a/src/Mod/Fem/Gui/PreCompiled.cpp
+++ /dev/null
@@ -1,24 +0,0 @@
-/***************************************************************************
- *   Copyright (c) 2008 Jürgen Riegel <juergen.riegel@web.de>              *
- *                                                                         *
- *   This file is part of the FreeCAD CAx development system.              *
- *                                                                         *
- *   This library is free software; you can redistribute it and/or         *
- *   modify it under the terms of the GNU Library General Public           *
- *   License as published by the Free Software Foundation; either          *
- *   version 2 of the License, or (at your option) any later version.      *
- *                                                                         *
- *   This library  is distributed in the hope that it will be useful,      *
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
- *   GNU Library General Public License for more details.                  *
- *                                                                         *
- *   You should have received a copy of the GNU Library General Public     *
- *   License along with this library; see the file COPYING.LIB. If not,    *
- *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
- *   Suite 330, Boston, MA  02111-1307, USA                                *
- *                                                                         *
- ***************************************************************************/
-
-
-#include "PreCompiled.h"
diff --git a/src/Mod/Fem/Gui/PreCompiled.h b/src/Mod/Fem/Gui/PreCompiled.h
index 62096fcca9..b44a51effb 100644
--- a/src/Mod/Fem/Gui/PreCompiled.h
+++ b/src/Mod/Fem/Gui/PreCompiled.h
@@ -25,8 +25,6 @@
 
 #include <FCConfig.h>
 
-#ifdef _PreComp_
-
 // standard
 #include <cassert>
 #include <cmath>
@@ -159,6 +157,4 @@
 #include <vtkLookupTable.h>
 #include <vtkPointData.h>
 
-#endif  //_PreComp_
-
 #endif  // FEMGUI_PRECOMPILED_H
diff --git a/src/Mod/Fem/Gui/PropertyFemMeshItem.cpp b/src/Mod/Fem/Gui/PropertyFemMeshItem.cpp
index fbf384d36a..6c68fc6fb0 100644
--- a/src/Mod/Fem/Gui/PropertyFemMeshItem.cpp
+++ b/src/Mod/Fem/Gui/PropertyFemMeshItem.cpp
@@ -20,12 +20,10 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QTextStream>
 #include <SMESH_Mesh.hxx>
-#endif
+
 
 #include <Mod/Fem/App/FemMeshProperty.h>
 
diff --git a/src/Mod/Fem/Gui/TaskAnalysisInfo.cpp b/src/Mod/Fem/Gui/TaskAnalysisInfo.cpp
index f702628af2..02810deaba 100644
--- a/src/Mod/Fem/Gui/TaskAnalysisInfo.cpp
+++ b/src/Mod/Fem/Gui/TaskAnalysisInfo.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Gui/BitmapFactory.h>
 
diff --git a/src/Mod/Fem/Gui/TaskCreateElementSet.cpp b/src/Mod/Fem/Gui/TaskCreateElementSet.cpp
index 13d762d29f..39e74e3ae1 100644
--- a/src/Mod/Fem/Gui/TaskCreateElementSet.cpp
+++ b/src/Mod/Fem/Gui/TaskCreateElementSet.cpp
@@ -20,8 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <boost/algorithm/string.hpp>
 
 #include <Inventor/events/SoMouseButtonEvent.h>
@@ -34,7 +32,6 @@
 #include <SMESH_Mesh.hxx>
 #include <SMESHDS_Mesh.hxx>
 #include <SMESH_MeshEditor.hxx>
-#endif
 
 #include <Base/Console.h>
 #include <Gui/Application.h>
diff --git a/src/Mod/Fem/Gui/TaskCreateNodeSet.cpp b/src/Mod/Fem/Gui/TaskCreateNodeSet.cpp
index 80369b37ff..66190ea37b 100644
--- a/src/Mod/Fem/Gui/TaskCreateNodeSet.cpp
+++ b/src/Mod/Fem/Gui/TaskCreateNodeSet.cpp
@@ -20,15 +20,12 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <Inventor/events/SoMouseButtonEvent.h>
 #include <Inventor/nodes/SoCamera.h>
 #include <Inventor/nodes/SoEventCallback.h>
 
 #include <SMESHDS_Mesh.hxx>
 #include <SMESH_Mesh.hxx>
-#endif
 
 #include <Base/Console.h>
 #include <Gui/Application.h>
diff --git a/src/Mod/Fem/Gui/TaskDlgAnalysis.cpp b/src/Mod/Fem/Gui/TaskDlgAnalysis.cpp
index 9fbaeaafcc..f7ba931f01 100644
--- a/src/Mod/Fem/Gui/TaskDlgAnalysis.cpp
+++ b/src/Mod/Fem/Gui/TaskDlgAnalysis.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Base/Console.h>
 #include <Base/Exception.h>
diff --git a/src/Mod/Fem/Gui/TaskDlgCreateElementSet.cpp b/src/Mod/Fem/Gui/TaskDlgCreateElementSet.cpp
index 85c764ed69..f79a9019d2 100644
--- a/src/Mod/Fem/Gui/TaskDlgCreateElementSet.cpp
+++ b/src/Mod/Fem/Gui/TaskDlgCreateElementSet.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 #include <Base/Console.h>
 #include <Base/Exception.h>
 #include <Gui/Application.h>
diff --git a/src/Mod/Fem/Gui/TaskDlgCreateNodeSet.cpp b/src/Mod/Fem/Gui/TaskDlgCreateNodeSet.cpp
index 5fb6733095..ba9f73ccfa 100644
--- a/src/Mod/Fem/Gui/TaskDlgCreateNodeSet.cpp
+++ b/src/Mod/Fem/Gui/TaskDlgCreateNodeSet.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Base/Console.h>
 #include <Base/Exception.h>
diff --git a/src/Mod/Fem/Gui/TaskDlgMeshShapeNetgen.cpp b/src/Mod/Fem/Gui/TaskDlgMeshShapeNetgen.cpp
index 068209de3b..80bf3571e3 100644
--- a/src/Mod/Fem/Gui/TaskDlgMeshShapeNetgen.cpp
+++ b/src/Mod/Fem/Gui/TaskDlgMeshShapeNetgen.cpp
@@ -20,11 +20,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QMessageBox>
-#endif
+
 
 #include <Base/Console.h>
 #include <Base/Exception.h>
diff --git a/src/Mod/Fem/Gui/TaskDriver.cpp b/src/Mod/Fem/Gui/TaskDriver.cpp
index 5b05e3c655..341d6a98e2 100644
--- a/src/Mod/Fem/Gui/TaskDriver.cpp
+++ b/src/Mod/Fem/Gui/TaskDriver.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Gui/BitmapFactory.h>
 
diff --git a/src/Mod/Fem/Gui/TaskFemConstraint.cpp b/src/Mod/Fem/Gui/TaskFemConstraint.cpp
index 8df9f10fb2..cac137556d 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraint.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraint.cpp
@@ -21,15 +21,13 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QKeyEvent>
 #include <QListWidget>
 #include <QMessageBox>
 #include <sstream>
-#endif
+
 
 #include <App/Document.h>
 #include <Gui/Application.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintBearing.cpp b/src/Mod/Fem/Gui/TaskFemConstraintBearing.cpp
index dc867d86be..c6ae18d397 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintBearing.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintBearing.cpp
@@ -21,16 +21,14 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <BRepAdaptor_Surface.hxx>
 #include <QAction>
 #include <QMessageBox>
 #include <TopoDS.hxx>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <App/Document.h>
 #include <Gui/Command.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintContact.cpp b/src/Mod/Fem/Gui/TaskFemConstraintContact.cpp
index f8d5959d41..a0cf0d9025 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintContact.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintContact.cpp
@@ -23,14 +23,11 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
+#include <limits>
+#include <sstream>
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
-#include <sstream>
-#include <limits>
-#endif
 
 #include "Mod/Fem/App/FemConstraintContact.h"
 #include <Gui/Command.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp b/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp
index 7a929b9212..39aa688781 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp
@@ -24,13 +24,11 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <Gui/Command.h>
 #include <Gui/Selection/SelectionObject.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp b/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp
index 334afac77f..27fc132837 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp
@@ -21,13 +21,11 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <sstream>
-#endif
+
 
 #include <App/Document.h>
 #include <Gui/Command.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp b/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp
index 6c0e196ab7..08c4a79693 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp
@@ -22,16 +22,14 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <TopoDS.hxx>
 #include <TopoDS_Shape.hxx>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <App/Document.h>
 #include <App/DocumentObject.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp b/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp
index a2d8c70d2c..a1cc98cbf5 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp
@@ -21,15 +21,13 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <TopoDS.hxx>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <App/DocumentObject.h>
 #include <App/Datums.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintGear.cpp b/src/Mod/Fem/Gui/TaskFemConstraintGear.cpp
index 6b9e1637a7..f10be2d015 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintGear.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintGear.cpp
@@ -21,13 +21,10 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
+#include <limits>
 
-#ifndef _PreComp_
 #include <QMessageBox>
 #include <TopoDS.hxx>
-#include <limits>
-#endif
 
 #include <App/Document.h>
 #include <Gui/Command.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintHeatflux.cpp b/src/Mod/Fem/Gui/TaskFemConstraintHeatflux.cpp
index a47e600982..9c3f5046ad 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintHeatflux.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintHeatflux.cpp
@@ -23,14 +23,12 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <Gui/Command.h>
 #include <Gui/Selection/SelectionObject.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintInitialTemperature.cpp b/src/Mod/Fem/Gui/TaskFemConstraintInitialTemperature.cpp
index 09d89ba89d..94f771a180 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintInitialTemperature.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintInitialTemperature.cpp
@@ -23,12 +23,10 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QMessageBox>
 #include <sstream>
-#endif
+
 
 #include <Gui/Command.h>
 #include <Mod/Fem/App/FemConstraintInitialTemperature.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintOnBoundary.cpp b/src/Mod/Fem/Gui/TaskFemConstraintOnBoundary.cpp
index ebc93875c2..0ce4249467 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintOnBoundary.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintOnBoundary.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "TaskFemConstraintOnBoundary.h"
 
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintPlaneRotation.cpp b/src/Mod/Fem/Gui/TaskFemConstraintPlaneRotation.cpp
index cafc4bbf47..526c4e03d3 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintPlaneRotation.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintPlaneRotation.cpp
@@ -23,14 +23,12 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <TopoDS.hxx>
 #include <sstream>
-#endif
+
 
 #include <App/DocumentObject.h>
 #include <Gui/Command.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp b/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp
index a39931be50..7da3e23bf3 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp
@@ -21,14 +21,12 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <Gui/Command.h>
 #include <Gui/Selection/SelectionObject.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintPulley.cpp b/src/Mod/Fem/Gui/TaskFemConstraintPulley.cpp
index 143118f68f..81fc27e5d9 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintPulley.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintPulley.cpp
@@ -21,12 +21,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
-#include <QMessageBox>
 #include <limits>
-#endif
+
+#include <QMessageBox>
 
 #include <Gui/Command.h>
 #include <Gui/Document.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintRigidBody.cpp b/src/Mod/Fem/Gui/TaskFemConstraintRigidBody.cpp
index f18a6f4692..2934fed33c 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintRigidBody.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintRigidBody.cpp
@@ -20,14 +20,12 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <App/Document.h>
 #include <Gui/Command.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintSpring.cpp b/src/Mod/Fem/Gui/TaskFemConstraintSpring.cpp
index 0657f8a40e..cb28d6ed66 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintSpring.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintSpring.cpp
@@ -21,14 +21,12 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <Gui/Command.h>
 #include <Gui/Selection/SelectionObject.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintTemperature.cpp b/src/Mod/Fem/Gui/TaskFemConstraintTemperature.cpp
index 1d412182cd..747b1a8ef2 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintTemperature.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintTemperature.cpp
@@ -23,14 +23,12 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QMessageBox>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <App/Document.h>
 #include <Gui/Command.h>
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp b/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp
index 3a91e79c1a..7fc7d35a13 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintTransform.cpp
@@ -24,16 +24,14 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <BRepAdaptor_Surface.hxx>
 #include <QAction>
 #include <QMessageBox>
 #include <TopoDS.hxx>
 #include <limits>
 #include <sstream>
-#endif
+
 
 #include <Gui/Command.h>
 #include <Gui/Selection/SelectionObject.h>
diff --git a/src/Mod/Fem/Gui/TaskObjectName.cpp b/src/Mod/Fem/Gui/TaskObjectName.cpp
index 0cdb3a62ce..c38c51715e 100644
--- a/src/Mod/Fem/Gui/TaskObjectName.cpp
+++ b/src/Mod/Fem/Gui/TaskObjectName.cpp
@@ -20,11 +20,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QString>
-#endif
+
 
 #include <App/DocumentObject.h>
 #include <Gui/BitmapFactory.h>
diff --git a/src/Mod/Fem/Gui/TaskPostBoxes.cpp b/src/Mod/Fem/Gui/TaskPostBoxes.cpp
index 1166da49f8..977df6e5ee 100644
--- a/src/Mod/Fem/Gui/TaskPostBoxes.cpp
+++ b/src/Mod/Fem/Gui/TaskPostBoxes.cpp
@@ -20,9 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <Inventor/SoPickedPoint.h>
 #include <Inventor/events/SoMouseButtonEvent.h>
 #include <Inventor/nodes/SoCoordinate3.h>
@@ -34,7 +31,6 @@
 #include <QMessageBox>
 #include <QMetaMethod>
 #include <QToolTip>
-#endif
 
 #include <App/Document.h>
 #include <Base/Console.h>
diff --git a/src/Mod/Fem/Gui/TaskPostExtraction.cpp b/src/Mod/Fem/Gui/TaskPostExtraction.cpp
index 1c80786c8b..57079e9a71 100644
--- a/src/Mod/Fem/Gui/TaskPostExtraction.cpp
+++ b/src/Mod/Fem/Gui/TaskPostExtraction.cpp
@@ -20,12 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
-
-#endif
-
 #include <Gui/PythonWrapper.h>
 #include <Gui/BitmapFactory.h>
 #include <Mod/Fem/App/FemPostFilter.h>
diff --git a/src/Mod/Fem/Gui/TaskTetParameter.cpp b/src/Mod/Fem/Gui/TaskTetParameter.cpp
index 699af188c9..636e1412f6 100644
--- a/src/Mod/Fem/Gui/TaskTetParameter.cpp
+++ b/src/Mod/Fem/Gui/TaskTetParameter.cpp
@@ -20,10 +20,8 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QString>
-#endif
+
 
 #include <Gui/BitmapFactory.h>
 #include <Mod/Fem/App/FemMesh.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderAnalysis.cpp b/src/Mod/Fem/Gui/ViewProviderAnalysis.cpp
index 44ab249090..51da492e5a 100644
--- a/src/Mod/Fem/Gui/ViewProviderAnalysis.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderAnalysis.cpp
@@ -20,16 +20,14 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/nodes/SoSeparator.h>
 #include <QAction>
 #include <QApplication>
 #include <QMenu>
 #include <QMessageBox>
 #include <QTextStream>
-#endif
+
 
 #include <App/Document.h>
 #include <App/MaterialObject.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraint.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraint.cpp
index c49ca9abd9..5da4db43a8 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraint.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraint.cpp
@@ -22,9 +22,7 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/nodes/SoMaterial.h>
 #include <Inventor/nodes/SoMultipleCopy.h>
 #include <Inventor/nodes/SoPickStyle.h>
@@ -33,7 +31,7 @@
 #include <Inventor/nodes/SoTransform.h>
 #include <QAction>
 #include <QMenu>
-#endif
+
 
 #include "App/Application.h"
 #include "Gui/Command.h"
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintBearing.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintBearing.cpp
index 5b4e98d286..d4b3470d43 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintBearing.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintBearing.cpp
@@ -21,13 +21,11 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/SbRotation.h>
 #include <Inventor/SbVec3f.h>
 #include <Inventor/nodes/SoSeparator.h>
-#endif
+
 
 #include "Gui/Control.h"
 #include "FemGuiTools.h"
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintContact.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintContact.cpp
index cd62f06283..d2158e08ef 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintContact.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintContact.cpp
@@ -23,11 +23,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
-#endif
-
 #include "Mod/Fem/App/FemConstraintContact.h"
 #include "TaskFemConstraintContact.h"
 #include "ViewProviderFemConstraintContact.h"
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintDisplacement.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintDisplacement.cpp
index 142ce3257c..18bb00786c 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintDisplacement.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintDisplacement.cpp
@@ -23,12 +23,10 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/nodes/SoSeparator.h>
 #include <Inventor/nodes/SoSwitch.h>
-#endif
+
 
 #include "Mod/Fem/App/FemConstraintDisplacement.h"
 #include "TaskFemConstraintDisplacement.h"
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintFixed.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintFixed.cpp
index b90fb3ba30..308ec08a8f 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintFixed.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintFixed.cpp
@@ -21,11 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
-#endif
-
 #include "Gui/Control.h"
 #include <Mod/Fem/App/FemConstraintFixed.h>
 
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintFluidBoundary.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintFluidBoundary.cpp
index 9813172d33..d314c19472 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintFluidBoundary.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintFluidBoundary.cpp
@@ -21,15 +21,13 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/SbRotation.h>
 #include <Inventor/SbVec3f.h>
 #include <Inventor/nodes/SoMultipleCopy.h>
 #include <Inventor/nodes/SoSeparator.h>
 #include <Precision.hxx>
-#endif
+
 
 #include "Gui/Control.h"
 #include <Mod/Fem/App/FemConstraintFluidBoundary.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintForce.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintForce.cpp
index 20d7832d3e..f5edccc66c 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintForce.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintForce.cpp
@@ -21,13 +21,11 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/SbMatrix.h>
 #include <Inventor/SbRotation.h>
 #include <Inventor/SbVec3f.h>
-#endif
+
 
 #include "Gui/Control.h"
 #include <Mod/Fem/App/FemConstraintForce.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintGear.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintGear.cpp
index e088fd7a01..f5d9451bb7 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintGear.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintGear.cpp
@@ -21,15 +21,13 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/SbMatrix.h>
 #include <Inventor/SbRotation.h>
 #include <Inventor/SbVec3f.h>
 #include <Inventor/nodes/SoSeparator.h>
 #include <Precision.hxx>
-#endif
+
 
 #include "Gui/Control.h"
 #include <Base/Console.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintHeatflux.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintHeatflux.cpp
index 1ccb7198c3..4123e6be44 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintHeatflux.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintHeatflux.cpp
@@ -23,11 +23,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
-#endif
-
 #include "Mod/Fem/App/FemConstraintHeatflux.h"
 #include <Gui/Control.h>
 
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintInitialTemperature.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintInitialTemperature.cpp
index 5ee02b3dcf..4d02bd4343 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintInitialTemperature.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintInitialTemperature.cpp
@@ -23,7 +23,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "Mod/Fem/App/FemConstraintInitialTemperature.h"
 #include <Gui/Control.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintOnBoundary.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintOnBoundary.cpp
index 07541b3b97..269f07d614 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintOnBoundary.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintOnBoundary.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Gui/Application.h>
 #include "Mod/Fem/App/FemConstraint.h"
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintPlaneRotation.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintPlaneRotation.cpp
index 8e2e75ee26..ba2c1375e6 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintPlaneRotation.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintPlaneRotation.cpp
@@ -23,11 +23,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
-#endif
-
 #include "Mod/Fem/App/FemConstraintPlaneRotation.h"
 #include <Gui/Control.h>
 
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintPressure.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintPressure.cpp
index 737b34994b..1e53b6a05c 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintPressure.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintPressure.cpp
@@ -21,13 +21,11 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/SbMatrix.h>
 #include <Inventor/SbRotation.h>
 #include <Inventor/SbVec3f.h>
-#endif
+
 
 #include "Mod/Fem/App/FemConstraintPressure.h"
 #include <Gui/Control.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintPulley.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintPulley.cpp
index 82aad692ea..67d87a1580 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintPulley.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintPulley.cpp
@@ -21,14 +21,12 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/SbRotation.h>
 #include <Inventor/SbVec3f.h>
 #include <Inventor/nodes/SoSeparator.h>
 #include <Precision.hxx>
-#endif
+
 
 #include <Base/Tools.h>
 #include "Gui/Control.h"
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintPyImp.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintPyImp.cpp
index e6d28673ed..745118ebe0 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintPyImp.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintPyImp.cpp
@@ -21,10 +21,8 @@
  *                                                                         *
  **************************************************************************/
 
-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <Inventor/nodes/SoSeparator.h>
-#endif
+
 
 #include <Base/Interpreter.h>
 
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintRigidBody.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintRigidBody.cpp
index a549bbb507..c02525b281 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintRigidBody.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintRigidBody.cpp
@@ -20,11 +20,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/nodes/SoTransform.h>
-#endif
+
 
 #include "Gui/Control.h"
 #include <Mod/Fem/App/FemConstraintRigidBody.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintSpring.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintSpring.cpp
index f4bfc64939..1e570d5b30 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintSpring.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintSpring.cpp
@@ -21,11 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
-#endif
-
 #include "Mod/Fem/App/FemConstraintSpring.h"
 #include <Gui/Control.h>
 
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintTemperature.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintTemperature.cpp
index bc26e407c9..56278039ce 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintTemperature.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintTemperature.cpp
@@ -23,11 +23,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
-#endif
-
 #include "Mod/Fem/App/FemConstraintTemperature.h"
 #include "TaskFemConstraintTemperature.h"
 #include "ViewProviderFemConstraintTemperature.h"
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintTransform.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintTransform.cpp
index 0b0299d868..800cbf7c18 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintTransform.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintTransform.cpp
@@ -24,16 +24,14 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/SbMatrix.h>
 #include <Inventor/SbRotation.h>
 #include <Inventor/SbVec3f.h>
 #include <Inventor/nodes/SoSeparator.h>
 #include <Inventor/nodes/SoSwitch.h>
 #include <Inventor/nodes/SoTransform.h>
-#endif
+
 
 #include "Mod/Fem/App/FemConstraintTransform.h"
 #include "TaskFemConstraintTransform.h"
diff --git a/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp b/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp
index c75b653886..7c1eaa4144 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp
@@ -20,9 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <Inventor/SbVec3f.h>
 #include <Inventor/details/SoFaceDetail.h>
 #include <Inventor/details/SoLineDetail.h>
@@ -44,7 +41,6 @@
 
 #include <SMESHDS_Mesh.hxx>
 #include <SMESH_Mesh.hxx>
-#endif
 
 #include <App/DocumentObject.h>
 #include <Base/BoundBox.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemMeshPyImp.cpp b/src/Mod/Fem/Gui/ViewProviderFemMeshPyImp.cpp
index cd476e6a84..0caf382c79 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemMeshPyImp.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemMeshPyImp.cpp
@@ -1,10 +1,8 @@
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <SMESHDS_Mesh.hxx>
 #include <SMESH_Mesh.hxx>
-#endif
+
 
 #include <Base/GeometryPyCXX.h>
 #include <Base/VectorPy.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemMeshShape.cpp b/src/Mod/Fem/Gui/ViewProviderFemMeshShape.cpp
index 6fc0256642..4796653b5e 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemMeshShape.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemMeshShape.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "ViewProviderFemMeshShape.h"
 
diff --git a/src/Mod/Fem/Gui/ViewProviderFemMeshShapeNetgen.cpp b/src/Mod/Fem/Gui/ViewProviderFemMeshShapeNetgen.cpp
index 7a3316c5d0..5aba6df24b 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemMeshShapeNetgen.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemMeshShapeNetgen.cpp
@@ -20,14 +20,12 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QAction>
 #include <QCoreApplication>
 #include <QMenu>
 #include <QMessageBox>
-#endif
+
 
 #include <Gui/Control.h>
 #include <Gui/MainWindow.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostBranchFilter.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostBranchFilter.cpp
index f3871c5873..90fdd93a34 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostBranchFilter.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostBranchFilter.cpp
@@ -20,8 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
 #include "TaskPostBoxes.h"
 #include "ViewProviderFemPostBranchFilter.h"
 #include <Mod/Fem/App/FemPostGroupExtension.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostFilter.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostFilter.cpp
index f6c60491b8..38449a99aa 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostFilter.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostFilter.cpp
@@ -20,11 +20,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <Inventor/nodes/SoDrawStyle.h>
-#endif
+
 
 #include <Mod/Fem/App/FemPostFilter.h>
 
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostFilterPyImp.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostFilterPyImp.cpp
index 5683ce2467..9d4cb51253 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostFilterPyImp.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostFilterPyImp.cpp
@@ -20,8 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
 // clang-format off
 #include <Gui/Control.h>
 #include <Gui/PythonWrapper.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostFunction.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostFunction.cpp
index 1c7132aa07..5091153ff3 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostFunction.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostFunction.cpp
@@ -20,9 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <cmath>
 
 #include <Inventor/actions/SoSearchAction.h>
@@ -41,7 +38,6 @@
 #include <QApplication>
 #include <QMessageBox>
 #include <QTextStream>
-#endif
 
 #include <App/Document.h>
 #include <Base/UnitsApi.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostObject.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostObject.cpp
index 9205e2d708..8bb79406fc 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostObject.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostObject.cpp
@@ -20,9 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <Inventor/nodes/SoCoordinate3.h>
 #include <Inventor/nodes/SoDepthBuffer.h>
 #include <Inventor/nodes/SoDrawStyle.h>
@@ -50,7 +47,6 @@
 #include <QApplication>
 #include <QMessageBox>
 #include <QTextStream>
-#endif
 
 #include <App/Document.h>
 #include <Gui/Application.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp
index 2a14b7a47c..5880ffb5d3 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp
@@ -20,11 +20,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <vtkPointData.h>
-#endif
+
 
 #include <App/FeaturePythonPyImp.h>
 #include <App/GroupExtension.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostPipelinePyImp.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostPipelinePyImp.cpp
index d206a06f1d..cc55513654 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostPipelinePyImp.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostPipelinePyImp.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 // clang-format off
 #include "ViewProviderFemPostPipeline.h"
diff --git a/src/Mod/Fem/Gui/ViewProviderResult.cpp b/src/Mod/Fem/Gui/ViewProviderResult.cpp
index 05deced184..fdaab6f9cb 100644
--- a/src/Mod/Fem/Gui/ViewProviderResult.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderResult.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "ViewProviderResult.h"
 
diff --git a/src/Mod/Fem/Gui/ViewProviderSetElementNodes.cpp b/src/Mod/Fem/Gui/ViewProviderSetElementNodes.cpp
index 9ff144c45e..b0e8b975e5 100644
--- a/src/Mod/Fem/Gui/ViewProviderSetElementNodes.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderSetElementNodes.cpp
@@ -21,7 +21,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Gui/Control.h>
 #include <Mod/Fem/App/FemSetElementNodesObject.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderSetElements.cpp b/src/Mod/Fem/Gui/ViewProviderSetElements.cpp
index e8dec90751..7f382f4738 100644
--- a/src/Mod/Fem/Gui/ViewProviderSetElements.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderSetElements.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "ViewProviderSetElements.h"
 
diff --git a/src/Mod/Fem/Gui/ViewProviderSetFaces.cpp b/src/Mod/Fem/Gui/ViewProviderSetFaces.cpp
index 19e6a05c6d..c8469ad6e7 100644
--- a/src/Mod/Fem/Gui/ViewProviderSetFaces.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderSetFaces.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "ViewProviderSetFaces.h"
 
diff --git a/src/Mod/Fem/Gui/ViewProviderSetGeometry.cpp b/src/Mod/Fem/Gui/ViewProviderSetGeometry.cpp
index 8c6d25c087..883c30c4fd 100644
--- a/src/Mod/Fem/Gui/ViewProviderSetGeometry.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderSetGeometry.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include "ViewProviderSetGeometry.h"
 
diff --git a/src/Mod/Fem/Gui/ViewProviderSetNodes.cpp b/src/Mod/Fem/Gui/ViewProviderSetNodes.cpp
index 397ab8c924..636b8f2be4 100644
--- a/src/Mod/Fem/Gui/ViewProviderSetNodes.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderSetNodes.cpp
@@ -20,7 +20,6 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
 #include <Gui/Control.h>
 #include <Mod/Fem/App/FemSetNodesObject.h>
diff --git a/src/Mod/Fem/Gui/ViewProviderSolver.cpp b/src/Mod/Fem/Gui/ViewProviderSolver.cpp
index ea4bdfadc1..cdd95e0413 100644
--- a/src/Mod/Fem/Gui/ViewProviderSolver.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderSolver.cpp
@@ -20,13 +20,11 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <QApplication>
 #include <QMessageBox>
 #include <QTextStream>
-#endif
+
 
 #include <Gui/Document.h>
 #include <Gui/MainWindow.h>
diff --git a/src/Mod/Fem/Gui/Workbench.cpp b/src/Mod/Fem/Gui/Workbench.cpp
index abbd507dd7..1773ace274 100644
--- a/src/Mod/Fem/Gui/Workbench.cpp
+++ b/src/Mod/Fem/Gui/Workbench.cpp
@@ -21,11 +21,9 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "PreCompiled.h"
 
-#ifndef _PreComp_
 #include <qobject.h>
-#endif
+
 
 #include <App/Application.h>
 #include <Gui/MenuManager.h>