Curve problem when converting model to "stp" format

I created a model in catia v5 which have some curved part when i convert this Model to stp file format the curve becomes improper and its disaster for me if send the stp to the client
and client wants stp file only.
why is this happening

3 Answers

Hi friend, good morning!!

Could you send us a picture about this issue?

Best Regards,

stp file when opened in Catia

Same stp file when opened in any other 3d modeling software