Ihave a dgn file open.  Running a vb.net program I get, for the first time, at this line a message

v8.ActiveModelReference.AddElement(DirectCast(oLine, MicroStationDGN._Element))

COMException was handled

No model reference is active

How do I get my ModelReference active?

Patrick

V8i  08.11.09.292

We often need to work with a given set of MIcroStation element types when writing an application for locating and scanning elements.  For example, we may want to work with lines and line-strings, and therefore want our users to be able to...

• Locate a line or line-string
• Scan for lines and line-strings

Because the MDL APIs for locate logica and scan logic are quite different, it's hard to remember to synchronise…

What should the Session object be set to in the following code...

Imports Session = Bentley.Internal.MicroStation.Session Private Sub someGroup                 Dim mySession as Session                 mySession.SetCurrentCommandName(“My Command”)                 mySession.StartUndoGroup()                 Command…                 Command…                 Command…                 mySession.EndUndoGroup End Sub

 I am getting the typical "Object reference not set to an instance of an object…