diff --git a/src/Mod/Part/App/modelRefine.h b/src/Mod/Part/App/modelRefine.h
index 29e97ccbb..8efa1271b 100644
--- a/src/Mod/Part/App/modelRefine.h
+++ b/src/Mod/Part/App/modelRefine.h
@@ -37,6 +37,7 @@
 #include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
 #include <TopTools_MapOfShape.hxx>
 #include <TopTools_ListOfShape.hxx>
+#include <BRepBuilderAPI_MakeShape.hxx>
 
 
 namespace ModelRefine
diff --git a/src/Mod/PartDesign/App/AppPartDesign.cpp b/src/Mod/PartDesign/App/AppPartDesign.cpp
index cad48c424..651889fe0 100644
--- a/src/Mod/PartDesign/App/AppPartDesign.cpp
+++ b/src/Mod/PartDesign/App/AppPartDesign.cpp
@@ -52,6 +52,7 @@
 #include "DatumPoint.h"
 #include "FeatureBoolean.h"
 #include "FeaturePrimitive.h"
+#include "DatumCS.h"
 
 namespace PartDesign {
 extern PyObject* initModule();
@@ -101,13 +102,15 @@ PyMODINIT_FUNC init_PartDesign()
     PartDesign::Plane              ::init();
     PartDesign::Line               ::init();
     PartDesign::Point              ::init();
+    PartDesign::CoordinateSystem   ::init();
     PartDesign::Boolean            ::init();
     PartDesign::FeaturePrimitive   ::init();
     PartDesign::Box                ::init();
     PartDesign::AdditiveBox        ::init();
     PartDesign::SubtractiveBox     ::init();
 
-    PartDesign::Point::initHints();
-    PartDesign::Line ::initHints();
-    PartDesign::Plane::initHints();
+    PartDesign::Point              ::initHints();
+    PartDesign::Line               ::initHints();
+    PartDesign::Plane              ::initHints();
+    PartDesign::CoordinateSystem   ::initHints();
 }
diff --git a/src/Mod/PartDesign/App/CMakeLists.txt b/src/Mod/PartDesign/App/CMakeLists.txt
index 07b995e5c..6cf9b899e 100644
--- a/src/Mod/PartDesign/App/CMakeLists.txt
+++ b/src/Mod/PartDesign/App/CMakeLists.txt
@@ -46,6 +46,8 @@ SET(DatumFeatures_SRCS
     DatumLine.h
     DatumPoint.cpp
     DatumPoint.h
+    DatumCS.h
+    DatumCS.cpp
 )
 SOURCE_GROUP("DatumFeatures" FILES ${DatumFeatures_SRCS})
 
diff --git a/src/Mod/PartDesign/App/FeaturePrimitive.cpp b/src/Mod/PartDesign/App/FeaturePrimitive.cpp
index c752d2951..310821bd0 100644
--- a/src/Mod/PartDesign/App/FeaturePrimitive.cpp
+++ b/src/Mod/PartDesign/App/FeaturePrimitive.cpp
@@ -27,32 +27,48 @@
 
 
 #include "FeaturePrimitive.h"
+#include "DatumPoint.h"
+#include <Mod/Part/App/modelRefine.h>
 #include <Base/Exception.h>
 #include <App/Document.h>
+#include <App/Application.h>
 #include <BRepPrimAPI_MakeBox.hxx>
 #include <BRepBuilderAPI_GTransform.hxx>
 #include <BRepAlgoAPI_Fuse.hxx>
 #include <BRepAlgoAPI_Cut.hxx>
+#include <QObject>
 
 using namespace PartDesign;
 
 namespace PartDesign {
 
-
 PROPERTY_SOURCE(PartDesign::FeaturePrimitive, PartDesign::FeatureAddSub)
 
 FeaturePrimitive::FeaturePrimitive()
   :  primitiveType(Box)
 {
-    ADD_PROPERTY(References, (0,0));//, "Primitive", (App::PropertyType)(App::Prop_None), "References to build the location of the primitive");
+    ADD_PROPERTY_TYPE(CoordinateSystem, (0), "Primitive", App::Prop_None, "References to build the location of the primitive");
+}
+
+TopoDS_Shape FeaturePrimitive::refineShapeIfActive(const TopoDS_Shape& oldShape) const
+{
+    Base::Reference<ParameterGrp> hGrp = App::GetApplication().GetUserParameter()
+        .GetGroup("BaseApp")->GetGroup("Preferences")->GetGroup("Mod/PartDesign");
+    if (hGrp->GetBool("RefineModel", false)) {
+        Part::BRepBuilderAPI_RefineModel mkRefine(oldShape);
+        TopoDS_Shape resShape = mkRefine.Shape();
+        return resShape;
+    }
+
+    return oldShape;
 }
 
 App::DocumentObjectExecReturn* FeaturePrimitive::execute(const TopoDS_Shape& primitiveShape)
 {
     try {
         //transform the primitive in the correct coordinance
-        BRepBuilderAPI_GTransform mkTrf(primitiveShape, getLocation().Transformation());
-        const TopoDS_Shape primitiveShape = mkTrf.Shape();
+        //BRepBuilderAPI_GTransform mkTrf(primitiveShape, getLocation().Transformation());
+        //const TopoDS_Shape primitiveShape = mkTrf.Shape();
         
         //if we have no base we just add the standart primitive shape
         TopoDS_Shape base;
@@ -81,6 +97,7 @@ App::DocumentObjectExecReturn* FeaturePrimitive::execute(const TopoDS_Shape& pri
             if (boolOp.IsNull())
                 return new App::DocumentObjectExecReturn("Resulting shape is not a solid");
             
+            boolOp = refineShapeIfActive(boolOp);
             Shape.setValue(boolOp);
             AddSubShape.setValue(primitiveShape);
         }
@@ -95,6 +112,7 @@ App::DocumentObjectExecReturn* FeaturePrimitive::execute(const TopoDS_Shape& pri
             if (boolOp.IsNull())
                 return new App::DocumentObjectExecReturn("Resulting shape is not a solid");
             
+            boolOp = refineShapeIfActive(boolOp);
             Shape.setValue(boolOp);
             AddSubShape.setValue(primitiveShape);
         }
@@ -109,9 +127,49 @@ App::DocumentObjectExecReturn* FeaturePrimitive::execute(const TopoDS_Shape& pri
     return App::DocumentObject::StdReturn;
 }
 
-TopLoc_Location FeaturePrimitive::calculateLocation()
-{
-    return TopLoc_Location();
+void FeaturePrimitive::onChanged(const App::Property* prop)
+{/*
+    if ((prop == &CoordinateSystem)) {
+        std::multiset<QString> refTypes;
+        std::vector<App::DocumentObject*> refs = References.getValues();
+        std::vector<std::string> refnames = References.getSubValues();
+        if (refs.size() != refnames.size())
+            return;
+
+        for (int r = 0; r < refs.size(); r++)
+            refTypes.insert(getRefType(refs[r], refnames[r]));
+
+        std::set<QString> hint;
+        if (hints.find(refTypes) != hints.end())
+           hint = hints[refTypes];
+        
+        if (!((hint.size() == 1) && (hint.find(QObject::tr("Done")) != hint.end())))
+            return; // incomplete references
+        
+        std::pair<Base::Vector3d, bool> origin = {Base::Vector3d(), false};
+        std::pair<Base::Vector3d, bool> dirX = {Base::Vector3d(), false};
+        std::pair<Base::Vector3d, bool> dirY = {Base::Vector3d(), false};
+        
+        for (int i = 0; i < refs.size(); i++) {
+            
+            if (refs[i]->getTypeId().isDerivedFrom(PartDesign::Point::getClassTypeId())) {
+                Base::Vector3d point = static_cast<PartDesign::Point*>(refs[i])->getPoint();
+                if (!origin.second)
+                    origin = {point, true};
+                else if(!dirX.second) {
+                    if((point-dirX.first).Sqr() < Precision::Confusion()) 
+                        return;
+                    dirX = {point, true};
+                }                
+                else if(!dirY.second) {
+                    if((origin.first-dirX.first).Sqr() < Precision::Confusion()) 
+                        return;
+                    dirY = {point, true};
+                }                
+            }            
+        }
+    }    */    
+    FeatureAddSub::onChanged(prop);
 }
 
 PROPERTY_SOURCE(PartDesign::Box, PartDesign::FeaturePrimitive)
diff --git a/src/Mod/PartDesign/App/FeaturePrimitive.h b/src/Mod/PartDesign/App/FeaturePrimitive.h
index c809a74fb..34e522696 100644
--- a/src/Mod/PartDesign/App/FeaturePrimitive.h
+++ b/src/Mod/PartDesign/App/FeaturePrimitive.h
@@ -48,19 +48,17 @@ public:
     virtual const char* getViewProviderName(void) const {
         return "PartDesignGui::ViewProviderPrimitive";
     }
-    Type getPrimitiveType() {return primitiveType;};
+    Type         getPrimitiveType() {return primitiveType;};      
+    TopoDS_Shape refineShapeIfActive(const TopoDS_Shape& oldShape) const;    
+    virtual void onChanged(const App::Property* prop);
     
-    /// The references defining the primtive base
-    App::PropertyLinkSubList References;
+    /// The references datum defining the primtive location
+    App::PropertyLink CoordinateSystem;
     
 protected:
     //make the boolean ops with the primitives provided by the derived features
     App::DocumentObjectExecReturn* execute(const TopoDS_Shape& primitiveShape);
-    
-    //calculate the position of the primitive from the support and the exis
-    TopLoc_Location calculateLocation();
-    
-    Type primitiveType;
+    Type primitiveType = Box;   
 };
 
 class PartDesignExport Box : public PartDesign::FeaturePrimitive {
diff --git a/src/Mod/PartDesign/Gui/AppPartDesignGui.cpp b/src/Mod/PartDesign/Gui/AppPartDesignGui.cpp
index 15ffd3d8d..cbc433bba 100644
--- a/src/Mod/PartDesign/Gui/AppPartDesignGui.cpp
+++ b/src/Mod/PartDesign/Gui/AppPartDesignGui.cpp
@@ -55,6 +55,7 @@
 #include "ViewProviderDatumPlane.h"
 #include "ViewProviderBoolean.h"
 #include "ViewProviderPrimitive.h"
+#include "ViewProviderDatumCS.h"
 
 // use a different name to CreateCommand()
 void CreatePartDesignCommands(void);
@@ -134,6 +135,7 @@ PyMODINIT_FUNC initPartDesignGui()
     PartDesignGui::ViewProviderDatumPoint    ::init();
     PartDesignGui::ViewProviderDatumLine     ::init();
     PartDesignGui::ViewProviderDatumPlane    ::init();
+    PartDesignGui::ViewProviderDatumCoordinateSystem::init();
     PartDesignGui::ViewProviderBoolean       ::init();
     PartDesignGui::ViewProviderPrimitive     ::init();
 
diff --git a/src/Mod/PartDesign/Gui/CMakeLists.txt b/src/Mod/PartDesign/Gui/CMakeLists.txt
index 2b3c7b7c9..89899d3ad 100644
--- a/src/Mod/PartDesign/Gui/CMakeLists.txt
+++ b/src/Mod/PartDesign/Gui/CMakeLists.txt
@@ -48,6 +48,7 @@ set(PartDesignGui_MOC_HDRS
     TaskMultiTransformParameters.h
     TaskDatumParameters.h
     TaskBooleanParameters.h
+    TaskPrimitiveParameters.h
 )
 fc_wrap_cpp(PartDesignGui_MOC_SRCS ${PartDesignGui_MOC_HDRS})
 SOURCE_GROUP("Moc" FILES ${PartDesignGui_MOC_SRCS})
@@ -118,6 +119,8 @@ SET(PartDesignGuiViewProvider_SRCS CommandPrimitive.cpp
     ViewProviderDatumLine.h
     ViewProviderDatumPlane.cpp
     ViewProviderDatumPlane.h
+    ViewProviderDatumCS.cpp
+    ViewProviderDatumCS.h
     ViewProviderBoolean.cpp
     ViewProviderBoolean.h
     ViewProviderPrimitive.h
@@ -185,6 +188,8 @@ SET(PartDesignGuiTaskDlgs_SRCS
     TaskBooleanParameters.ui
     TaskBooleanParameters.cpp
     TaskBooleanParameters.h
+    TaskPrimitiveParameters.h
+    TaskPrimitiveParameters.cpp
 )
 SOURCE_GROUP("TaskDialogs" FILES ${PartDesignGuiTaskDlgs_SRCS})
 
diff --git a/src/Mod/PartDesign/Gui/CommandPrimitive.cpp b/src/Mod/PartDesign/Gui/CommandPrimitive.cpp
index 36493c39b..56247f2fa 100644
--- a/src/Mod/PartDesign/Gui/CommandPrimitive.cpp
+++ b/src/Mod/PartDesign/Gui/CommandPrimitive.cpp
@@ -54,7 +54,6 @@ CmdPrimtiveCompAdditive::CmdPrimtiveCompAdditive()
 
 void CmdPrimtiveCompAdditive::activated(int iMsg)
 {
-    Base::Console().Message("activated msg %i\n", iMsg);
     
     PartDesign::Body *pcActiveBody = PartDesignGui::getBody(/*messageIfNot = */true);
     if (!pcActiveBody) return;
@@ -62,13 +61,23 @@ void CmdPrimtiveCompAdditive::activated(int iMsg)
     if(iMsg == 0) {
     
         std::string FeatName = getUniqueObjectName("Box");
+        std::string CSName = getUniqueObjectName("CoordinateSystem");
         
         Gui::Command::openCommand("Make additive box");
-        Gui::Command::doCommand(Gui::Command::Doc,"App.activeDocument().addObject(\'PartDesign::AdditiveBox\',\'%s\')",
+        Gui::Command::doCommand(Gui::Command::Doc,"App.ActiveDocument.addObject(\'PartDesign::AdditiveBox\',\'%s\')",
             FeatName.c_str());
-        Gui::Command::doCommand(Doc,"App.activeDocument().%s.addFeature(App.activeDocument().%s)"
+        Gui::Command::doCommand(Doc,"App.ActiveDocument.%s.addFeature(App.activeDocument().%s)"
                         ,pcActiveBody->getNameInDocument(), FeatName.c_str());
-        Gui::Command::doCommand(Gui::Command::Gui, "Gui.activeDocument().setEdit(\'%s\')", FeatName.c_str());       
+        Gui::Command::doCommand(Gui::Command::Doc,"App.ActiveDocument.addObject(\'PartDesign::CoordinateSystem\',\'%s\')",
+            CSName.c_str());
+        Gui::Command::doCommand(Doc,"App.ActiveDocument.%s.addFeature(App.activeDocument().%s)"
+                        ,pcActiveBody->getNameInDocument(), CSName.c_str());
+        Gui::Command::doCommand(Gui::Command::Doc,"App.ActiveDocument.%s.CoordinateSystem=(App.ActiveDocument.%s)",
+            FeatName.c_str(), CSName.c_str());
+        Gui::Command::updateActive();
+        
+        Gui::Command::doCommand(Gui, "Gui.activeDocument().hide(\'%s\')", CSName.c_str());
+        Gui::Command::doCommand(Gui, "Gui.activeDocument().setEdit(\'%s\')", FeatName.c_str());    
     }
 }
 
@@ -135,17 +144,22 @@ CmdPrimtiveCompSubtractive::CmdPrimtiveCompSubtractive()
 }
 
 void CmdPrimtiveCompSubtractive::activated(int iMsg)
-{
-    Base::Console().Message("activated msg %i\n", iMsg);
-    return;
-
-    // Since the default icon is reset when enabing/disabling the command we have
-    // to explicitly set the icon of the used command.
-    Gui::ActionGroup* pcAction = qobject_cast<Gui::ActionGroup*>(_pcAction);
-    QList<QAction*> a = pcAction->actions();
-
-    assert(iMsg < a.size());
-    pcAction->setIcon(a[iMsg]->icon());
+{  
+    PartDesign::Body *pcActiveBody = PartDesignGui::getBody();
+    if (!pcActiveBody) return;
+    
+    if(iMsg == 0) {
+    
+        std::string FeatName = getUniqueObjectName("Box");
+        
+        Gui::Command::openCommand("Make subtractive box");
+        Gui::Command::doCommand(Gui::Command::Doc,"App.activeDocument().addObject(\'PartDesign::SubtractiveBox\',\'%s\')",
+            FeatName.c_str());
+        Gui::Command::doCommand(Doc,"App.activeDocument().%s.addFeature(App.activeDocument().%s)"
+                        ,pcActiveBody->getNameInDocument(), FeatName.c_str());
+        Gui::Command::doCommand(Gui::Command::Gui, "Gui.activeDocument().setEdit(\'%s\')", FeatName.c_str());  
+        Gui::Command::updateActive();
+    }
 }
 
 Gui::Action * CmdPrimtiveCompSubtractive::createAction(void)
diff --git a/src/Mod/PartDesign/Gui/TaskDatumParameters.cpp b/src/Mod/PartDesign/Gui/TaskDatumParameters.cpp
index 46ec22793..09427876b 100644
--- a/src/Mod/PartDesign/Gui/TaskDatumParameters.cpp
+++ b/src/Mod/PartDesign/Gui/TaskDatumParameters.cpp
@@ -277,7 +277,9 @@ void TaskDatumParameters::updateUI()
     std::set<QString> hint = pcDatum->getHint();    
 
     if (hint == std::set<QString>()) {
-        QMessageBox::warning(this, tr("Illegal selection"), tr("This feature cannot be created with this combination of references"));
+        if(!refs.empty())
+            QMessageBox::warning(this, tr("Illegal selection"), tr("This feature cannot be created with this combination of references"));
+        
         if (refs.size() == 1) {
             onButtonRef1(true);
         } else if (refs.size() == 2) {
diff --git a/src/Mod/PartDesign/Gui/ViewProviderBody.cpp b/src/Mod/PartDesign/Gui/ViewProviderBody.cpp
index 6160fece6..de5ae55eb 100644
--- a/src/Mod/PartDesign/Gui/ViewProviderBody.cpp
+++ b/src/Mod/PartDesign/Gui/ViewProviderBody.cpp
@@ -37,6 +37,7 @@
 #include <Mod/PartDesign/App/FeatureMultiTransform.h>
 #include <Mod/PartDesign/App/DatumLine.h>
 #include <Mod/PartDesign/App/DatumPlane.h>
+#include <Mod/PartDesign/App/DatumCS.h>
 #include <algorithm>
 
 #include "Base/Console.h"
@@ -184,7 +185,7 @@ void ViewProviderBody::updateData(const App::Property* prop)
     //    (prop->getTypeId() == App::PropertyLinkList::getClassTypeId() && strcmp(prop->getName(),"Model") == 0))
     //   // updateTree();
 
-    // Update the visual size of datum lines and planes
+    // Update the visual size of datums
     PartDesign::Body* body = static_cast<PartDesign::Body*>(getObject());
     std::vector<App::DocumentObject*> features = body->Model.getValues();
     for (std::vector<App::DocumentObject*>::const_iterator f = features.begin(); f != features.end(); f++) {
@@ -193,6 +194,8 @@ void ViewProviderBody::updateData(const App::Property* prop)
             plm = &(static_cast<PartDesign::Line*>(*f)->Placement);
         else if ((*f)->getTypeId().isDerivedFrom(PartDesign::Plane::getClassTypeId()))
             plm = &(static_cast<PartDesign::Plane*>(*f)->Placement);
+        else if ((*f)->getTypeId().isDerivedFrom(PartDesign::CoordinateSystem::getClassTypeId()))
+            plm = &(static_cast<PartDesign::CoordinateSystem*>(*f)->Placement);
 
         if (plm != NULL) {
             Gui::ViewProviderDocumentObject* vp = dynamic_cast<Gui::ViewProviderDocumentObject*>(Gui::Application::Instance->getViewProvider(*f));
diff --git a/src/Mod/PartDesign/Gui/ViewProviderDatum.cpp b/src/Mod/PartDesign/Gui/ViewProviderDatum.cpp
index a3c25dd02..7648e031b 100644
--- a/src/Mod/PartDesign/Gui/ViewProviderDatum.cpp
+++ b/src/Mod/PartDesign/Gui/ViewProviderDatum.cpp
@@ -62,6 +62,7 @@
 #include <Gui/Application.h>
 #include <Gui/MDIView.h>
 #include <Mod/PartDesign/App/Body.h>
+#include <Mod/PartDesign/App/DatumCS.h>
 
 using namespace PartDesignGui;
 
@@ -92,6 +93,8 @@ void ViewProviderDatum::attach(App::DocumentObject *obj)
         datumType = QObject::tr("Line");
     else if (o->getTypeId() == PartDesign::Point::getClassTypeId())
         datumType = QObject::tr("Point");
+    else if (o->getTypeId() == PartDesign::CoordinateSystem::getClassTypeId())
+        datumType = QObject::tr("CoordinateSystem");
 
     SoShapeHints* hints = new SoShapeHints();
     hints->shapeType.setValue(SoShapeHints::UNKNOWN_SHAPE_TYPE);
diff --git a/src/Mod/PartDesign/Gui/ViewProviderPrimitive.cpp b/src/Mod/PartDesign/Gui/ViewProviderPrimitive.cpp
index b634877a8..1c4b39df0 100644
--- a/src/Mod/PartDesign/Gui/ViewProviderPrimitive.cpp
+++ b/src/Mod/PartDesign/Gui/ViewProviderPrimitive.cpp
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (c) 2013 Jan Rheinländer <jrheinlaender@users.sourceforge.net>        *
+ *   Copyright (c) 2015 Stefan Tröger <stefantroeger@gmx.net>              *
  *                                                                         *
  *   This file is part of the FreeCAD CAx development system.              *
  *                                                                         *
@@ -28,11 +28,13 @@
 #endif
 
 #include "ViewProviderPrimitive.h"
+#include "TaskPrimitiveParameters.h"
 #include <Mod/PartDesign/App/FeaturePrimitive.h>
 #include <Gui/TaskView/TaskDialog.h>
 #include <Gui/Control.h>
 #include <Gui/Command.h>
 #include <Gui/Application.h>
+#include <Base/Console.h>
 
 
 using namespace PartDesignGui;
@@ -49,16 +51,16 @@ ViewProviderPrimitive::~ViewProviderPrimitive()
 }
 
 bool ViewProviderPrimitive::setEdit(int ModNum)
-{/*
+{
     if (ModNum == ViewProvider::Default ) {
         // When double-clicking on the item for this fillet the
         // object unsets and sets its edit mode without closing
         // the task panel
         Gui::TaskView::TaskDialog *dlg = Gui::Control().activeDialog();
-        TaskDlgBooleanParameters *booleanDlg = qobject_cast<TaskDlgBooleanParameters *>(dlg);
-        if (booleanDlg && booleanDlg->getBooleanView() != this)
-            booleanDlg = 0; // another pad left open its task panel
-        if (dlg && !booleanDlg) {
+        TaskPrimitiveParameters *primitiveDlg = qobject_cast<TaskPrimitiveParameters *>(dlg);
+        if (primitiveDlg)
+            primitiveDlg = 0; // another pad left open its task panel
+        if (dlg && !primitiveDlg) {
             QMessageBox msgBox;
             msgBox.setText(QObject::tr("A dialog is already open in the task panel"));
             msgBox.setInformativeText(QObject::tr("Do you want to close this dialog?"));
@@ -78,18 +80,24 @@ bool ViewProviderPrimitive::setEdit(int ModNum)
         oldWb = Gui::Command::assureWorkbench("PartDesignWorkbench");
 
         // start the edit dialog
-        if (booleanDlg)
-            Gui::Control().showDialog(booleanDlg);
+        if (primitiveDlg)
+            Gui::Control().showDialog(primitiveDlg);
         else
-            Gui::Control().showDialog(new TaskDlgBooleanParameters(this));
+            Gui::Control().showDialog(new TaskPrimitiveParameters(this));
 
         return true;
     }
     else {
         return PartGui::ViewProviderPart::setEdit(ModNum);
-    }*/
-
-    return false;
+    }
 }
 
+std::vector< App::DocumentObject* > ViewProviderPrimitive::claimChildren(void) const {
+    
+//    Base::Console().Message("claim children\n");
+    std::vector< App::DocumentObject* > vec;
+    vec.push_back(static_cast<PartDesign::FeaturePrimitive*>(getObject())->CoordinateSystem.getValue());
+    
+    return vec;
+}
 
diff --git a/src/Mod/PartDesign/Gui/ViewProviderPrimitive.h b/src/Mod/PartDesign/Gui/ViewProviderPrimitive.h
index dbe54c821..106688aef 100644
--- a/src/Mod/PartDesign/Gui/ViewProviderPrimitive.h
+++ b/src/Mod/PartDesign/Gui/ViewProviderPrimitive.h
@@ -39,6 +39,8 @@ public:
     /// destructor
     virtual ~ViewProviderPrimitive();
     
+    virtual std::vector< App::DocumentObject* > claimChildren(void) const;
+    
 protected:
     virtual bool setEdit(int ModNum);
 };