I am currently trying to create an assembly consisting of a valve with a flange on either end. I am doing this so when I create pipework I can automatically insert the valve with the flanges and not have to mate it in. I have put in two route points at the same location as the individual flange route points, as well as the connection points, but when I try to drag and drop into a piping assembly a box comes up with "Cannot insert files into routing assemblies". Is this because there are two route points, or is there another problem???