"Phantom" Ceiling Plane

[coogan]

Duh! I should have known that.

Thanks for the tip. Yes, that would no doubt find the problem, though in a large plan it could take quite some time, unless you were to get lucky, fairly quickly.

Thanks to both you and Brad. As I told Brad, this is a very good program, even with the occasional glitches. Good luck finding another program with as many capabilities that works as well (without spending a lot more money). I just wish I could afford the full version of Chief Architect.