Hello, I'm using AutoCad 2004. Briefly I've constructed a box with windows and a doorway. The windows and doorway have depth, ie a 'z' dimension. Whatever I select either the parts of an individual window or all the windows or even the whole thing. Rightclicking after selection just returns to the original state. ie, nothing joined.
The 'union' just doesnt seem to work. I've selected all the different objects and they dont form a solid. I did a test on another drawing and it works fine. What could be different on this one? Thanks.