I ended up using audit and wblock to make it work. I noticed that if I started a drawing from scratch I had no problems between 2002 and 3.3, in my case the problem was generated from design files sent to me from the owner which I did a "save as" to (the client was rushing me).
Thanks
At first we thought it was a file size issue (some files where 800kb) but then it happened with small files, I did try saving as acad 14, I heard maybe if I save as 12 it might work, I also have MDT 4.0 available to me, maybe if I save as 4.0 ? I am going tu try Monday
Thnaks
I am sending autocad 2000 dwg files to a client who works on arch. desktop 3.3 and he gets an "out of memoty" error when opening some of the files. he has a good computer 528 mb ram, 26 GB free HD space. I send the same files to other friends on acad and they open fine, my clients...