I am having a major problem with AutoCAD Mechanical 2013. I will spend hours doing working on drawings, constantly saving, then close out the drawing. When I try to open the drawing, I get no response, AutoCAD will not open it. Sometimes I am able to take the back up drawing, rename it to dwg and open it but most of the time I have lost hours of work. We are saving to a network server. We have just recently upgraded our computers with fresh installs of autocad.
Thanks in advance
Brian Handleson