Hi Michael. I've attached both a McMaster-Carr STEP file that imports as a group with discrete objects and an ACE file that imports as a solid that I wish was organized as group. Just to repeat my question, it is up to the provider of such a file how they organize it ? and if providing a group what would they call such a feature ? Does it rely on a certain STEP version ? I'd like to ask ACE about this if it something they just aren't providing, but first would like to understand how it works and what to ask for.

Appreciatively, Sven