I added GoPort (Partid=11) object to the GoLabeledLink object and found that the following is not working?

Dim PortObj As GoObject = myGV.Document.FindPart(11)

Please advice.

GoLabeledLink and GoPort are both IGoIdentifiablePart, so this should work.

You are using GoDocument.MaintainsPartID and not setting the partID yourself, right?

Sorted - thanks my partid was cleared…