This is a confirmed bug that showed up in SU 7.1, but was not present in 7.0. If you have overlapping components, and are editing one of them, you cannot scribe to the line where they intersect. The inference engine will not find that intersection. I use this trick all the time, so I had to back off to version 7.0. It's really too bad, as 7.1 was a lot faster, and you'll notice the slowdown if you back down to 7.0. They promise to fix it in the next release.

You can get the old version here. Make sure you uninstall 7.1 first. CB.