In my section views drawing, I sample my corridor, which will show up in the section views.
However, when I save the drawing (maybe the first time, maybe the umpteenth time), I will get an error during save, with the warning to do a recover. When I reopen the drawing, the corridor I sampled has disappeared.
I sometimes get one error when I audit (AcDbSpatialIndex(A6ACF) was repaired), before or after sampling the corridor. It fixes during audit.
But the error keeps repeating.
Just for info, the corridor drawing is xref'ed in, and that drawing had no errors during audit.
Any thoughts?