I have created soem piping routes ( 3d sketches and 2d sketches ) in a .ipt All fully constrained.
I have placed that .ipt in an assembly and wish to constrain pipe and flanges to the 3d sketch routes. I am unable to select any of the 3d sketches. I can constrain to the 2d sketches.
attached is a sample sketch that I can not attach to.
IV2010 ( no tube and pipe module)