I think it want's to remove duplicate references to submodels.
As far I know SR3D doesn't (fully) support MPD's it want's a single flat model.
Or..
Some part is at the exact same place a another, something that messes with he part snapping I'm guessing.
As far I know SR3D doesn't (fully) support MPD's it want's a single flat model.
Or..
Some part is at the exact same place a another, something that messes with he part snapping I'm guessing.