This isn't a crash technically... You are already closing your AutoCAD Vertical session when this comes up. From a few threads that I have read, basically your session is holding onto an AEC module during the exit process, and the session isn't releasing it properly as it closes.
This is a very harmless error. Some have claimed that it is due to installing 2013. I disagree since I get the error and have never installed 2013! Some have reported that a repair of 2012 pruducts fixes the error. Again not my experience.
Here are some of the threads...
The last thread gives what I think is the best plausible reason for the error, see Peter Funk's reply no 11. ~ Mary
Thanx i will look at the links you provided
I too have never installed 2013, havnt tried repair yet, that seldom works imho, uninstall and reinstall often works better with strange errors!
Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.