Unable to transform objects

When attempting to scale polysurfaces in the latest build of Rhino 5, some objects won’t comply. The command line reads: "unable to transform 11 objects"
I’ve never run into this problem before. Any ideas?

Can you post a model?

I think I managed to solve the issue in an isolated model by exploding the polysurface, grouping it, then scaling it before shrinking trimmed surfaces and merging all faces, but maybe there’s another solution

bstevenson_test.3dm(3.6 MB)

Hmm- no problems here so far with the posted file…