I am trying to export models made in Pro/Engineer 2001 to .OBJ format, and some models work, but some just crash Pro/E. It acctually just goes off the screen and has to be re-started. I don't know if it has to do with rounds or what. I found a page that said to change one of the values on the export box to half the size of the smallest round. And i believe i am doing this, but on one of the parts of the assembly it just continues to do the same thing. Has anybody run into this problem, and is ther a solution? Thanks for any help in advance. David