My file rendered fine in 4.0 but when I open it and save it in 5.0 then render in mental ray it crashes. Do you have to import it or could there be other problems. I did get rid of all history.

Thanks

PS. The system I was running was a pIII 600 with 640 mg pc100 ram 66 controler IDE drive and it rendered slow but fine. I upgraded to a AMD XP 2500 barton, 1 gig DDR400 running dual channel and an SATA 80 gig drive and now it crashes with 5.0.