1) When I save NDrawingDocument to PersistencyFormat.CutomBinary (from my program or from standard Nevron.Diagram.Designer.exe) links between ports and plugs are not saved. I send examples docs.zip with document saved in NDB (all links are ok) and CNDB (all links are broken).

2) NDrawingDocument implements ICloneable interface and CloneWithNewUniqueId method, but both possible clone methods fails when called. It is possible to clone NDrawingDocument without saving anl loading it from temporary file or memory stream? (on implementing cloning through save/restore from memory stream I found error with PersistencyFormat.CutomBinary).