I was just wondering if Autodesk has a workaround for this as yet?? It's been almost a year since I posted this and haven't heard anything more from anyone at Autodesk as to whether or not this has been addressed. Via a patch or in any of the newer versions of Mechanical. You can read the enitre string with the post update I made earlier today. Here is the original question:

Posts: 4
Registered: 11/25/08
Help...System Var ATTDIA??
Posted: Nov 24, 2008 9:59 PM Reply

It seems that AutoCAD Mechanical doesn't save the system vaiable ATTDIA when changed. When I change the variable to 0 and close out the program and re-open the program it reverts back to 1. This seems to only be a problem with "Mechanical" versions of AutoCAD. Straight versions save the system variable to whatever it was changed to last. I could change it each time I start using the .mnl file but lack the knowledge. Is there something I'm missing?? I've set up several versions of AutoCAD with custom menus that require ATTDIA be set to 0 in order to function properly. Every "Mechanical" version I've ran across has this does this. I don't how to get it to change permanently. Can someone shed some light on this issue? Has anyone else experienced this?