I am getting a validity check error when I go to save, even after purging unused, and after deleting the only two 3D warehouse components I downloaded since it last worked. I also was able to save those components in a different model by themselves without errors. They were over-sized when downloaded, but I shrank them and have no other errors from them. Everything else is just simple geometry I created myself.
I tried copying the entire model to a new model but it lost most of my model when doing Ctrl-A to get everything before copying and pasting to a new model, even things where the layers were turned on.
What to do??
Results of Validity Check.
*** Problems were found that could not be fixed! ***
The entity at address 82cd81b0 has an invalid id (0) destroyed (0)