VB API - Can't create new part

[GoWatzmann]

Hello,

get error "pfcExceptions::XToolkitNotFound" at "BaseSession.RetrieveModel(oModelDescriptor)". What's wrong?

                Dim oModelDescriptorCreate As New pfcls.CCpfcModelDescriptor
                Dim oModelDescriptor As pfcls.IpfcModelDescriptor = oModelDescriptorCreate.Create(pfcls.EpfcModelType.EpfcMDL_PART, "test.prt", Nothing)
                Dim ModelPart As pfcls.IpfcModel = BaseSession.RetrieveModel(oModelDescriptor)
                Dim oWindow As pfcls.IpfcWindow = BaseSession.OpenFile(oModelDescriptor)
                oWindow.Activate()