I have an assembly with other assemblies within. When rebuilding entire assembly, specific assemblies move slightly. Despite mates. Ideas?
Your assemblies that moves are mirrored?
Do they stay in the wrong place, or move back after a brief period of time? And could there be conflicting Mates, or circular references?
Whole lot of issues, to test; suppress or hide components prior to the mirror, to see which part is giving you the issues.
I figured it out. I had used a feature of the parent assembly to create references while editing a part in a smaller assembly. I was getting an "out of context error message"
Retrieving data ...