I have been using SW for almost 10 years and this just bugs the crap out of me. When I draw a line and want to add a line either next to it or maybe later and add a relation to it like maybe parallel, I get this stupid error "This relation could not be added because it would cause invalid geometry in the sketch" WTF???? All I want to do is add a line & have a relation to another line. Anyone that can help me, pleeeeez do!!