I am using autoCAD LT 2010 and have this problem almost everytime I am working with it. I'll be working with a drawing and lock my computer (required when leaving workarea for any reason). When I come back and unlock my computer and go to start working with the same drawing I get a fatal error. I have tried un-installing and re-installing the program, which did not fix the issue. If anyone can help me with this it would be greatly appreciated. When it happens again I'll be able to give more info.
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