Copy Frame design in vault gives skeleton errors.

[jblower]

I did a copy design on a model that contained a frame generated frame.  I get all these errors.  Usually when I do a rebuild all the file fixes it'self but I get the above error every time I try to open the file.  All I really know is that it has something to do with the skeleton.  Anybody know what's happening.

[Gabriel_Watson]

Not sure how relevant this is below, but as a rule of thumb I stay away from using Copy Design for iParts, iAssemblies, and Frame Generator assemblies:
https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Vault-Copy-Design-...

[talha.tufan523TD]

İt could be 2 Skeleton.ipt in the workspace ? Could you check fiile naming options for copy design ? 

[BDCollett]

Copy Design of Frame Generated assemblies works, you just have to be careful not to "re-use" the skeleton model.

Hard to tell exactly what the issue is that you are having from that image alone.