When creating a offset section cut in a drawing, I would usually get a preview but once I indicate where I want it placed the only thing that's displayed is a big red "X". Any suggestion why and how I can fix this? Thanks...
I have had the same problem in R10. In my case it was a Brep imported as a STP from another program. However, this does not always happen. Depending on what system it comes from, the Brep's behave differently.