Holy ****! I **** up big time...
I was editing an xref (using refedit) and all of the sudden a whole block just disappear!!
It's not just a block like a door or a window it was the "new addition" block. I divided the project using blocks: New addition / existing / to be removed... etc
Anyway, it's gone! So I go and start looking for the .bak files (backup). Well, because it's an xref and I usually edit it using "refedit" I could only find one .back file from last month
So I go back, into the damage xref file. Everything looks fine with the exception that the entire new addition block is missing. So I find the block in the block list, but when I try to put it in the work area it doesn't show up