I wonder if some of this is a RedSDK updating issue (force a redraw - Caching of Model Space off and flick to Paper Space then Back to Model Space to get a RedSDK reload of graphics).
Thanks for the lead Darrel but it does not help.
I did reinstall V21 and opened the drawing there, saved back to v21 of course, and the walls are fine there. I guess I'll do architectural stuff there. I had created hoards of architectural stuff in V21 and never encountered issues like I do in the later versions. This seems to be one of the biggest hoops I've encounter with TurboCAD that I can remember - do mechanical in the later versions, do architectural in V21.
I can't help but think that TurboCAD should have stopped development at V21 when they had hit near perfection, IMHO. And......
Microsoft should have stopped at Window 7 for the same reason. I installed Windows 10 on my new computer and have wished ever since that I had installed Windows 7.
I know this is a bit of a rant and one can't stop "progress" as it is part of what makes the world turn, but it sure sucks when progress doesn't feel like progress at all.