Hi @Anonymous,

I am working in your drawing a bit and so far I can't duplicate the issue. Is it perhaps that I don't have all the Xref's attached? Does this make any difference in your drawing session?

Also, I found 57 errors when I performed AUDIT. Perhaps you could run this and see if your problem persists.

Please also, if possible, try to keep track of what functions you are doing just prior to this happening.

Please hit the Accept as Solution button if my post fully solves your issue or answers your question.