[quote user="dgn2dwg"]
It seems I am not "aware of things like multiple attachments and other nuances of the reference system".
I may need some instructions about the nested Attachments or References.
[/quote]
If you have no (enough) knowledge about how references work in MicroStation and the overall concept including references hierarchy etc., to participate on a MicroStation user or administrator training is a must for you as the first step.
Jan