I've seen it fairly often, especially while doing a lot of corridor section edits. I think that there's a way to turn off the undo function and then turn it back on again. When you do that the program apparently starts a new file.
... I think that there's a way to turn off the undo function and then turn it back on again. ...
Undo, Control, None or One
Undo, Control, All
I have done this so many.....times today. It doesn't work. Software is Civil 3D 2013. A couple of computers have the message "Warning! Undo has been disabled in order to prevent undo file overflow. You may re-enable it via the undo command. The undo file length was 1768915703 bytes". I've been using the UNDO command since Release '08 & I've never seen this problem. I have search & search & nothing seems to work....how do you control the length of the UNDO command. I don't understand how UNDOCTL works cause it's read only. Does anyone have a solution?