Our office is currently using Autocad 2006, for Fire Sprinkler drawings. Since I've been here I've learned alot about the program. We've come across an odd problem, just today though. I've bursted alot of my drawings as opposed to exploding them, lately if I were to explode a drawing, the block that I exploded, would turn generic, i.e. "RM NUMBER" "100" or something along those lines. So The burst command has been a good friend of mine these last few weeks. Well onto the problem. My co-workers here are also operating on acad 2006 but for some unknown reason, they do not have this command, I came on here searching for an answer to why they receive a "command unknown" message after typing it in. I found that the menu button can be found in "express tools" under "blocks" but I do not have this menu button either. Maybe what I read about was from a different version, I'm not sure. All I know is I'm befuddled by it. Any help is greatly appreciated.