Parasolid Import Data

I have some parasolid data that I import into an emptyassembly.When I read it in it looks fine and I can save it andclose thewindow and re-open the file. The problems comes when I tryto workwith it. I  can assemble it as a sub-assemblyinto another assembly and save and close window, but when Iopenit up I get this message.

 The internal document does not match the internal IDsavedwith the referencing document. Select YES to accept thisdocumentanyway. Select NO to browse for a replacement model.

If I select yes the model disappears from the working window,andthe parts are in the model tree grayed out. If I open up one oftheparts I can't see it in the working window either.

I am a new user and do not know what any of this informationmeans.If anyone has any information I would appreciate the help.Thanks,have a good day.
SolidworksImport export