Our engineer says this about import into Pro/E:
"Whenever we (Eng) receive an export file from (designers) we have to rename as follows before we can use it
1.change .STEP to .stp or .iges to .igs if necessary
2.remove all upper case letters in the name ( suffix or prefix)
3.remove...
We have users who send data to our engineers who use other software packages, and they have trouble with the all-caps, more-than-three-letter extensions that Solidworks uses, especially for STEP export. Is there a way to change this default so that SW always uses 3-letter, lower-case extensions?