AutoCAD 2010/2011/2012 DWG Format

[#1]

Sometimes when I go to save my drawing, it says its being used by another proces, or opened by another user, when it is not.  I have to save it to another name.  Then when I go to delete the old file, it again says its already open.  If it does let me delete the old file, it pops back up when I refresh, I can't get it to go away unless I reboot my computer.  It's not due to the computer crashing, it's not due to xref.'s, and it happens on any drive I work on.  Any suggestions as to what could cause this to happen?  Very annoying and time consuming.

[#2]

Antivirus software is scanning it or your network is indexing it are my guess.

[#3]

Look in task manager to see if more than 1 ACAD.exe is running.

I've had it where when I close AutoCAD the GUI goes away but the the process never stops (which keeps your file locked).

WHen this has happended I've run a repair and things started working correctly. This can also happen if you are using third party apps that might not behave correctly and keep ACAD from closing correctly.

[#4]

I have had this happen on two occasions (using Civil 3D 2011 on XP 64bit), the last occasion being yesterday. I am at a loss.

It only happens when I save to networked drives, the one common thing on both occasions appears to be that I was using data extraction, unsure if this is coincidence.

Yesterday, I had a file that saved normally prior to the data extraction, but after adding the data extraction table to the drawing and saving CAD froze for 2-3 mins and I recieved the save error quoted in the original post. (I'm unsure if the data extraction is just coincidence)

I was then left with a dwg file on our server that I can't delete or rename.

Curiously if I use a collegues pc I can delete the offending file, however as soon as I start working on my own pc within the network location, the offening file returns!

Any advice appreciated as myself and my IT dept are stumped.

[#5]

If you restart your PC (XP 64bit?) can you then delete the file?

[#6]

We did try, but unfortunately it made no difference.

[#7]

I experienced this problem because another user had the sheet set open.

The file kept re-appearing, we closed the sheet set file and I was able to delete the file.

[#8]

I also had similar problen with a drawing with pasted linked exel table. Turned out that if the table is opened on other machine it prevents autocad to close DWG file as well