Either your file is Corrupted PTC Tech Support may be able
to help or it was created on a Unix Version of Pro/E.
I recommend to Delete old versions then save so you will
always have a latest and previous version of your files. If
you opened a part and delete old versions the one you
originally opened wasn't corrupted so if you delete old
versions the opened okay version will exist along with a
later .(prt,drw,asm,sec).#+1 file.
Hopefully Pro/E can auto fix the file if not tech support
has powerful tools that can most times fix any errors in
the corrupt part.
Michael
