2020 Unable to save drawing - saving a .tmp instead?

[Biedy]

Hello all, 

Not a work stopper here, more of a what the heck?

I have been updating older files on our server. Open the file, make a change or 2, then close, say yes to save changes, and get the error message I've attached. "Unable to save the drawing". When I go to the folder in explorer, the .tmp file is there, but the .dwg file is gone - just gone. Click "ok" in the error message, do a qsave instead and everything is as normal - current file is saved, .dwg is back in the folder; the .tmp file remains. I've audited and recovered - no errors. It happens every time I close these 2 files without saving first. The .tmp files pile up.

This has happened with 2 different files in the last 24 hours. It did not happen with these files in the past.

The details:

Windows 10 Pro, current update

AuoCAD Lt 2020 - current update

Graphics card etc on request - don't see that they are in play here...

Thanks,

Anne

eta... If I say "no" when I exit, I get the .tmp file and no .dwg. Change the file extension, open the dwg and works as normal. No errors. 

Things that make you say Hmmmm

[cadffm · Accepted solution]

And there is not an problem if you saveas in dwg2013 or dwg2018 Format, or still a problem?

If not or so long we are without a sample.DWG, just linking to the knowledgebase page.

https://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/Error-...

https://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/DWG-fi...

[Biedy]

Thank you - I followed one of your links and found the answer.

For some reason the .bak file properties were set to "read only".  Makes sense when you think about it.

I unchecked that and all is normal. 

I appreciate the help.

Anne