Hello;I'm wondering if anyone has experienced this.  I have an assembly and I'm making a simple mate between the upturned metal edge and the centerline plane shown.  The message "part association failed" comes up.Unfortunately I've not found a way to attach files in this forum, but you can see the screen shot herehttp://www.flickr.com/photos/60961560@N00/7128862593/in/photostreamI appreciate any suggestionsthanksAaron

update, I went through the assembly and the part association failure is in the vertical tube, not the piece that I'm trying to mate.  I still can't find where the failure is, but hopefully it will show itself