When I was opening the file.. and working on it.. it crashed and tells it Fatal Error  out of memory - shutdown.When I shut it down and restart teh Autocad.. after few minutes, still. it appears.. this is just recent..I do have 4GB Ram but Autocad uses only 2G.. can anyone knows how to fix this?

If you are using a 32-bit operating system, any application can use only 2GB max. Make sure you have enough virtual memory and disk space.

64bit windows Xp operating System..  and I adjust the Virtual Memory.. but still crashes and wanted to restart.

What is the size of the DWG file you are working with?Does the problem happen with any drawing (even new ones) or just a particular drawing?Usually out of memory errors are caused by a lack of sufficient virtual memory.What exactly did you do when you changed your settings?

I just right click MY COMPUTER ->select properties ->Advanced -> Performance Settings -> Advanced Tab-> Changed Virtual Memory -Thats how i adjust.The .dwg  is more than 10MB not just for the same file but any files that has bigger sizes..

hello,not applicable command to cad might one of the cause of fatal error. 3d cad working then can slower its performance and causes fatal error. try not to corporate all your working drawings.

[QUOTE=sysgen]I just right click MY COMPUTER ->select properties ->Advanced -> Performance Settings -> Advanced Tab-> Changed Virtual Memory -Thats how i adjust.The .dwg  is more than 10MB not just for the same file but any files that has bigger sizes..[/QUOTE]What settings did you actually use?If your drawings are 10MB or more and your computer has only 4GB of RAM you are going to see a performance hit.What is your hard drive capacity?  How much free space do you have?