Zoom extreme

[Gunzzz]

I tried all suggestions and it was a manual dimension that was causing the problem. I never did find it though but by zooming out selecting and erasing of them all on that floor, cured the problem.
Looks like Tim was the winner this time. I just hid all layers except that one and dumped all the dimensions. It won't take too long to get them back again, certainly less time than I've spent trying to solve this problem:mad:

Thanks again,