diff --git a/src/Mod/Fem/femguiobjects/_ViewProviderFemMeshGmsh.py b/src/Mod/Fem/femguiobjects/_ViewProviderFemMeshGmsh.py
index 0ca14f9784..ed445b237c 100644
--- a/src/Mod/Fem/femguiobjects/_ViewProviderFemMeshGmsh.py
+++ b/src/Mod/Fem/femguiobjects/_ViewProviderFemMeshGmsh.py
@@ -176,11 +176,13 @@ class _ViewProviderFemMeshGmsh:
         return (reg_childs + gro_childs + bou_childs)
 
     def onDelete(self, feature, subelements):
-        try:
-            for obj in self.claimChildren():
-                obj.ViewObject.show()
-        except Exception as err:
-            FreeCAD.Console.PrintError("Error in onDelete: " + err.message)
+        childs = self.claimChildren()
+        if len(childs) > 0:
+            try:
+                for obj in self.claimChildren():
+                    obj.ViewObject.show()
+            except Exception as err:
+                FreeCAD.Console.PrintError("Error in onDelete: {0} \n".format(err))
         return True
 
     def canDragObjects(self):
diff --git a/src/Mod/Fem/femguiobjects/_ViewProviderFemResultMechanical.py b/src/Mod/Fem/femguiobjects/_ViewProviderFemResultMechanical.py
index 766170a8db..f91cf4e9fa 100644
--- a/src/Mod/Fem/femguiobjects/_ViewProviderFemResultMechanical.py
+++ b/src/Mod/Fem/femguiobjects/_ViewProviderFemResultMechanical.py
@@ -108,11 +108,13 @@ class _ViewProviderFemResultMechanical:
         return [self.Object.Mesh]  # claimChildren needs to return a list !
 
     def onDelete(self, feature, subelements):
-        try:
-            for obj in self.claimChildren():
-                obj.ViewObject.show()
-        except Exception as err:
-            FreeCAD.Console.PrintError("Error in onDelete: {0} \n".format(err))
+        childs = self.claimChildren()
+        if len(childs) > 0:
+            try:
+                for obj in self.claimChildren():
+                    obj.ViewObject.show()
+            except Exception as err:
+                FreeCAD.Console.PrintError("Error in onDelete: {0} \n".format(err))
         return True
 
 
diff --git a/src/Mod/Part/CompoundTools/_CommandCompoundFilter.py b/src/Mod/Part/CompoundTools/_CommandCompoundFilter.py
index 97e5067ea3..5d358999bb 100644
--- a/src/Mod/Part/CompoundTools/_CommandCompoundFilter.py
+++ b/src/Mod/Part/CompoundTools/_CommandCompoundFilter.py
@@ -97,10 +97,14 @@ def cmdCreateCompoundFilter(name):
         FreeCADGui.doCommand("f.Proxy.execute(f)")
         FreeCADGui.doCommand("f.purgeTouched()")
     except Exception as err:
+        if hasattr(err, "message"):
+            error_string = err.message
+        else:
+            error_string = err
         mb = QtGui.QMessageBox()
         mb.setIcon(mb.Icon.Warning)
-        mb.setText(_translate("Part_CompoundFilter", "Computing the result failed with an error: \n\n{err}\n\nClick 'Continue' to create the feature anyway, or 'Abort' to cancel.", None)
-                   .format(err=err.message))
+        mb.setText(_translate("Part_CompoundFilter", "Computing the result failed with an error: \n\n{errstr}\n\nClick 'Continue' to create the feature anyway, or 'Abort' to cancel.", None)
+                   .format(errstr=error_string))
         mb.setWindowTitle(_translate("Part_CompoundFilter", "Bad selection", None))
         btnAbort = mb.addButton(QtGui.QMessageBox.StandardButton.Abort)
         btnOK = mb.addButton(_translate("Part_SplitFeatures", "Continue", None), QtGui.QMessageBox.ButtonRole.ActionRole)