diff --git a/src/Mod/Fem/femsolver/calculix/writer.py b/src/Mod/Fem/femsolver/calculix/writer.py
index 4b14a2aed1..c087586041 100644
--- a/src/Mod/Fem/femsolver/calculix/writer.py
+++ b/src/Mod/Fem/femsolver/calculix/writer.py
@@ -1304,18 +1304,20 @@ class FemInputWriterCcx(writerbase.FemInputWriter):
                 f.write('S, E, PEEQ\n')
             else:
                 f.write('S, E\n')
-            
+
             # dat file
-            f.write('** outputs --> dat file\n')
-            f.write('** reaction forces for Constraint fixed\n')
-            # reaction forces for all Constraint fixed
-            # freecadweb.org/tracker/view.php?id=2934
-            for femobj in self.fixed_objects:
-                # femobj --> dict, FreeCAD document object is femobj['Object']
-                fix_obj_name = femobj['Object'].Name
-                f.write('*NODE PRINT, NSET={}, TOTALS=ONLY\n'.format(fix_obj_name))
-                f.write('RF\n\n')
-            # TODO: add Constraint Displacement if nodes are restrained
+            # reaction forces: freecadweb.org/tracker/view.php?id=2934
+            if self.fixed_objects:
+                f.write('** outputs --> dat file\n')
+                # reaction forces for all Constraint fixed
+                f.write('** reaction forces for Constraint fixed\n')
+                for femobj in self.fixed_objects:
+                    # femobj --> dict, FreeCAD document object is femobj['Object']
+                    fix_obj_name = femobj['Object'].Name
+                    f.write('*NODE PRINT, NSET={}, TOTALS=ONLY\n'.format(fix_obj_name))
+                    f.write('RF\n')
+                # TODO: add Constraint Displacement if nodes are restrained
+                f.write('\n')
 
             # there is no need to write all integration point results
             # as long as there is no reader for them
diff --git a/src/Mod/Fem/femtest/testfiles/ccx/cube_static.inp b/src/Mod/Fem/femtest/testfiles/ccx/cube_static.inp
index 627200ad7b..c66fed8eab 100644
--- a/src/Mod/Fem/femtest/testfiles/ccx/cube_static.inp
+++ b/src/Mod/Fem/femtest/testfiles/ccx/cube_static.inp
@@ -588,6 +588,11 @@ FemConstraintFixed,3
 U
 *EL FILE
 S, E
+** outputs --> dat file
+** reaction forces for Constraint fixed
+*NODE PRINT, NSET=FemConstraintFixed, TOTALS=ONLY
+RF
+
 
 ***********************************************************
 ** written by write_step_end function
diff --git a/src/Mod/Fem/femtest/testfiles/ccx/multimat.inp b/src/Mod/Fem/femtest/testfiles/ccx/multimat.inp
index 2ee08bd283..cd80542ab2 100644
--- a/src/Mod/Fem/femtest/testfiles/ccx/multimat.inp
+++ b/src/Mod/Fem/femtest/testfiles/ccx/multimat.inp
@@ -1280,6 +1280,11 @@ ConstraintFixed,3
 U
 *EL FILE
 S, E
+** outputs --> dat file
+** reaction forces for Constraint fixed
+*NODE PRINT, NSET=ConstraintFixed, TOTALS=ONLY
+RF
+
 
 ***********************************************************
 ** written by write_step_end function
diff --git a/src/Mod/Fem/femtest/testfiles/ccx/spine_thermomech.inp b/src/Mod/Fem/femtest/testfiles/ccx/spine_thermomech.inp
index 5cb9b15c21..210cadd779 100644
--- a/src/Mod/Fem/femtest/testfiles/ccx/spine_thermomech.inp
+++ b/src/Mod/Fem/femtest/testfiles/ccx/spine_thermomech.inp
@@ -197,6 +197,11 @@ FemConstraintTemperature,11,11,310.93
 U, NT
 *EL FILE
 S, E
+** outputs --> dat file
+** reaction forces for Constraint fixed
+*NODE PRINT, NSET=FemConstraintFixed, TOTALS=ONLY
+RF
+
 
 ***********************************************************
 ** written by write_step_end function