FATAL ERROR: Unhandled Access Violation Reading 0x0f6c Exception at 47c0b2hI have three users that are working on a project in AutoCAD Civil 3D 2011 which has started resulting in Fatal Error messages. All of them are seeing the same error messages (just with the number portions changing) doing a variety of tasks. The machines are a mix of Windows XP SP3 (32Bit - 4GB of Memory) and Windows 7 Pro SP1 (64Bit - 8GB of Memory) using a mapped drive location on a Windows 2008 R2 server (64Bit - Dual Quad Core - 8GB of Memory) with a gigabit network. Usually after the error Civil complains that it cannot continue and offers to attempt to save work. After clicking yes the application closes. Any help or insight on this matter would be greatly appreciated! Thanks,Jason

The place to begin is with an AUDIT of the file and go from there.
 
Dave.

DaveThanks for the reply. I'm not the end user, but I've spoken with them and they're ran the audit command on several of files and seem to be fine.

 
This is a Windows Vista, Windows 7 security issue.
Go to Advanced System Properties and disable the DEP( Data Execution Prevention ) only for Autocad.
Narada