In AutoCAD 2012 and products based on it, saving the drawing while in the block editor can result in your whole drawing being replaced by the block you’re editing. As this can be somewhat inconvenient, it’s probably a good idea to download and install Autodesk’s hotfix for this problem. As always, read the readme first.
Good to find this hotfix, I was searching for it everywhere. Thanks You!
Can the hotfix reverse the replacement of the file that was lost? Is there any way that you can go back and retrieve the model?