Hi Magnus, for a quick fix right now use the "Purge" command in Rhino before saving. That should eliminate these extra objects.

The problem is related to blocks. Even though you don't have any block "instances" in that file anymore, there are still the block "definition" objects in there. In Rhion, "Purge" will remove any block definitions that are not currently used by any instances.

Right now there is a bug in MoI where it reads in the block definition objects as if they were regular objects. That's why you are seeing those extra objects inside of MoI.

I have fixed this bug for the next beta (which should be coming really soon, hopefully today), so that MoI will check if an object is marked as a block definition object and will skip over it.

- Michael