I've completed a few pipe routs, with no issues (one of my first attempts at a real job after some parcticing).  After working with the routs foe a while, (a couple of hours), suddenly as I edited each route the elbows disappeared for bends. now there are no elbows at all in the job.  What could have gone wrong.  A checked the search pats and they seam correct, and it was working fine to begin with.  now when I start a new route, even in a new file, still no elbows.