Welcome to the forum.
Can you go into a more detail explanation of what is happening?
One thing I can tell you that when you import stp files or parasolids or even igs files, no matter
what software they are coming from they always import as dumb solids. Meaning what ever
properties or features that existed prior do not convert over when they come into the new software.
If this solved your issue please mark this posting "Accept as Solution".
Or if you like something that was said and it was helpful, Kudos are appreciated. Thanks!!!!
Best Regards,
Scott McFadden
(Colossians 3:23-25)