DWGs not saved by AutoDesk application

[kc8akw]

I am off site, using Electrical 2013 with a borrowed license.  My customer uses ACAD 2012LT.  After saving a non ELECTRICAL drawing from my program, both of us get a warning that "This DWG file was saved by an application that was not developed or licenced by AutoDesk."  While it seems more of a nuisance than anything else, it would be nice to find out what is causing this message to appear.

[RobinShou-Autodesk]

Hello,

Can you restart the machine and have a check again? If the issue is reproduce again?

If the issue is reproducible, then can you open a new drawing, and save it to see if the issue is also there for a new drawing? Just want to see if it is a drawing problem or a application problem.

If it is a drawing problem, then may be need you to send the drawing to me for checking.

Thanks,
Robin Shou
Quality Assurance
Autodesk AutoCAD Electrical