Solid Edge Assembly can not be turned into FOA - all Icons grayed out

In this example, a Customer wants to turn an assembly into a "Family of Assemblies", but the corresponding Icons ("Add Member", etc.) are grayed out.

This happens if the assembly has been opened in context of a parent assembly - so if user is doing RMB->"Open" (or "Edit") on a subassembly, it will not be possible to turn this subassembly into an FOA.

The solution is to open the subassembly by itself - this will ensure that there is no dependency to other opened assembly files.

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