Hi Britt. I've tried to answer this at another location Error "Cannot do 3D operations on curved segments" which offers an option to solve this, but I cannot for the life of me find "official" documentation as to why it's not allowed either. Maybe someone will chime in between the 2 posts with more info.
Cheers,
Todd
Hey Todd.
Yeah that's pretty much how we've been getting around that problem too. We have instructed our technicians not to draw in true curves; and if they have to draw some in to make sure to generalize them before posting the edits.
Britt