I tried the following 2 methods and it still didn't work. I kept getting this "drawing is invalid" message.
Open this dwg file in TrueDWG
I read some threads that you now have to have the old AutoCAD to open the 2007 or before dwg files. Is that true.
If anybody can open it I greatly appreciate it.
Solved! Go to Solution.
looking at the frile in notepad++, every character is a NUL. at a guess, somebody used an application to wipe the file and over-write it. ot else a pretty substantial error on the hard drive
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