Hi Danny, I had seen in some STEP format imports into MoI from other programs that the object names are sometimes set to things like "Assembly: Object" , so that's why I was wondering if just having the names set up like that would work.

Apparently there needs to be more stuff set up in order for it to work, but I'm not really sure.

What happens if you import the attached files in (these have just 3 objects in them), do they work better or the same? These are from a couple of different programs. If they work differently then maybe I will be able to see what is different in their structures.

- Michael