Hello Everyone!

Its been a while I have not post anything. Well I have been getting an error on attaching a xpresso node graph to a gui manual
dialog. I don't know or understand why its not working but hope y'all can he me.
Code:

        self.GroupBegin(self.ID_GRP, c4d.BFH_SCALEFIT, 1, 0, "")
        # Static UI Text
        self.AddStaticText(0, c4d.BFH_CENTER, 0, 15, "Node Editor", c4d.BORDER_WITH_TITLE_BOLD)
        # Get Active Document
        doc = c4d.documents.GetActiveDocument()
        if doc == None:
            return False
        # Search for the Object in the (Objects) List Manger Hierarchy Outliner Tab.
        getnodeobj = doc.SearchObject("node")
        if getnodeobj == None:
            return ValueError("Make sure the selected object.")       
        # Retrieves the Xpresso Tag
        graphtag = getnodeobj.GetTag(c4d.Texpresso)
        if graphtag is None:
            raise ValueError("Make sure the selected object get an Xpresso Tag.")        
        else:
            # Set Xpresso Tag Name
            graphtag[c4d.ID_BASELIST_NAME]="Custom Node Graph Editor"
            print(graphtag)
            """
            Retrieves the node master and retrieves the Root node (the Main XGroup) 
            that holds all others nodes and set name of (the Main XGroup)
            """
            gvNodeMaster = graphtag.GetNodeMaster()
            if gvNodeMaster is None:
                raise RuntimeError("Failed to retrieves the Node Master.")
            else:
                nodegraph_root_group = gvNodeMaster.GetRoot()
                if nodegraph_root_group is None:
                    raise RuntimeError("Failed to retrieves the Root Node.")
                else:
                    # Set the Main XGroup Name            
                    nodegraph_root_group[c4d.ID_BASELIST_NAME]="Tool Node Editor"
                    print(nodegraph_root_group)
                # Add to UI
                self.AddUserArea(self.ID_NODE_VIEWPORT, c4d.BFH_CENTER, 350, 200)
                self.AttachUserArea(gvNodeMaster, self.ID_NODE_VIEWPORT)
        self.GroupEnd()

Error in Console:

But if there is another way of making a custom node graph editor via python , I would love to know.
Any help would be very much appreciated.

cheers, Ashton