System Variable problem

I am having a very frustrating problem.. random system variables keep changing from drawing to drawing during the same session of AutoCAD. In one dwg. it may be mtext editor, but in the next it may be pickdrag, and it is never the same system variable. I use the default settings for these commands, no lisp routines. Any ideas how to fix this? I have used the SETENV and the setting still will not hold. When I open AutoCAD again, another variable has changed.

Would appreciate any help..

AutoCAD 2009

Thanks

A temporary fix might be to run a lisp routine each time you open a drawing that resets all your most important variables. But it sounds like you really need to get to the root of the problem because what you describe is far from normal.

Have you considered a REPAIR?

I am having a very frustrating problem.. random system variables keep changing from drawing to drawing during the same session of AutoCAD. In one dwg. it may be mtext editor, but in the next it may be pickdrag, and it is never the same system variable. I use the default settings for these commands, no lisp routines. Any ideas how to fix this? I have used the SETENV and the setting still will not hold. When I open AutoCAD again, another variable has changed.

 

Would appreciate any help..

 

AutoCAD 2009

 

Thanks

Something is changing these - the key is finding out what.

Take a look at this post I made a while back. It includes some lisp code to create a reactor that will alert you the instant a tagged sysvar changes. Then you can see what is occurring that is causing it.

http://cadpanacea.com/node/53

First, I've been using Land Desktop 2009 for nearly two years without this issue.

Second, system variables don't change themselves. Drawing templates can be set wrong, poorly written routines/macros can cause problems, etc.

Before attempting a repair etc. Try running some tests through the default profile.

Edit: RK beat me while I was typing this out on my iPhone. LoL

Some system variables are saved in the drawing others in the registry. Try checking the system variables in Express Tools to see where the system variables are saved that keep changing by you. If the system variables that change are saved in the drawing set up your templates to reflect your preferences, otherwise try implementing what ReMark and rkmcswain suggested.