Compiling some file fromats

Hi! everybody.

I try to compile into Momentics (Win32) some source files, ported from
anywhere. I imported them and when build the project it seems that the
aren’t present (and they are at projects root).

Then I edited them in a Linux environment and then ported again, and
surprise the files were compiled.

Does anyone know if there are a spacial caveat with file format? I wonder
to know in order to no spent this time again.

Thanks in advance