+ need dummy class for FeaturePython class to work

src/Mod/Fem/App/AppFem.cpp

@@ -118,6 +118,7 @@ void AppFemExport initFem()
  
     Fem::FemAnalysis                ::init();
     Fem::FemAnalysisPython          ::init();
+    Fem::DocumentObject             ::init();
     Fem::FeaturePython              ::init();
     Fem::FemMesh                    ::init();
     Fem::FemMeshObject              ::init();

src/Mod/Fem/App/FemAnalysis.cpp

@@ -69,6 +69,8 @@ void FemAnalysis::onChanged(const Property* prop)
 }
 
 
+// Dummy class 'DocumentObject' in Fem namespace
+PROPERTY_SOURCE_ABSTRACT(Fem::DocumentObject, App::DocumentObject)
 
 // Python feature ---------------------------------------------------------
 
@@ -95,7 +97,7 @@ template class AppFemExport FeaturePythonT<Fem::FemAnalysis>;
 
 namespace App {
 /// @cond DOXERR
-PROPERTY_SOURCE_TEMPLATE(Fem::FeaturePython, App::DocumentObject)
+PROPERTY_SOURCE_TEMPLATE(Fem::FeaturePython, Fem::DocumentObject)
 template<> const char* Fem::FeaturePython::getViewProviderName(void) const {
     return "Gui::ViewProviderPythonFeature";
 }

src/Mod/Fem/App/FemAnalysis.h

@@ -64,8 +64,13 @@ protected:
     virtual void onChanged (const App::Property* prop);
 };
 
+class AppFemExport DocumentObject : public App::DocumentObject
+{
+    PROPERTY_HEADER(Fem::DocumentObject);
+};
+
 typedef App::FeaturePythonT<FemAnalysis> FemAnalysisPython;
-typedef App::FeaturePythonT<App::DocumentObject> FeaturePython;
+typedef App::FeaturePythonT<DocumentObject> FeaturePython;
 
 
 } //namespace Fem