When I try to open a previous file I get the following message. An attempt was made to access an unnamed file past its end. I then click OK and try too open the file and I get an message saying Unexpected file format. How can I fix this so I can open the file?
That error is caused by a file that has corrupted data. You may potentially be able to save the geometry by using File/Merge and merging the file into a blank document. From my experience, however, this does not generally work. It may be possible that the backup that BobCAD generates may work still. The backup files can be found at C:\BobCAD-CAM Data\BobCAD-CAM (Version #)\BackUp.