This thread is the closest I could find related to my problem, so I will be reviving it ;)
On a current GEOPAK Site design project, I decided to split the effort between two individuals knowing that we could merge the Models later (or import one Model's Objects into the other). We just tried to merge them and got an error when trying to import an Object from a different .gsf. I suspect this error is related to the fact that the Microstation elements that are associated with the imported Object do not exist. Can I just copy those dgn elements into the current dgn before importing the Object? Any help is much appreciated.