We've been having a problem lately and I was wondering if anyone else has had this problem. What I would do is have a sheet metal part, then create a drawing to drop the flat pattern onto. (We do it that way to get labels into the drawing). Then I go back to the model (without saving the drawing yet) to check the symmetry of the part to see if I need to put a note saying that the part is not symmetrical and if I need to add a witness mark. After I do the check, I try to go back to the drawing and it gives me an error

that says this

"An unknown error occured whole accessing an unnamed file"

I then click ok and SolidWorks proceeds to crash. It only seems to happen with imported parts, and If I save things before I do the symmetry check it's ok. But this situation is totally recreatable and does the same thing with two of our computers here. (So I don't think that it's the installation)

Anyone else have this problem?