Mudbox reports that my model has incomplete UV's

I am trying to export my model to Mudbox, Mudbox is reporting that my model has incomplete uv sets. I have looked this error up, and all it means is that some of the UV’s have4 not been mapped. Is there a way to find unmapped UV’s or would I have to post this question in the Python forum to see if there is a way to do this through python?

If your model has UVs than ALL the faces have UVs.

Ensure no UVs are overlapping
Ensure no UVs are touching the sides of the UV map

Post a demo blend file that gives this error in mudbox