I do a lot of 3d work. So I need to make polylines from lines in existing drawings. If I have lines creating a curved wall. I cant seemto easily get the end points to connect so I can join them into a polyline. I have seen this before but this one drawing I am currently using is very problematic. They seem to be connected but apparently they are not. All the lines are on a "0" Z plane. Is there a setting for cennecting or "welding" endpoints that might be set too high or too low that I am unaware of?