I have an enclosure that I split into 4 pieces so I could print it on my Ender and I was successful in creating a single lip and groove on two of the 4 solid bodies. When I went to make the second, SW crashed, and now crashes whenever I choose that fastening feature. Even if I create a new part, split it, and try to make a lip groove SW crashes. I restarted SW, rebooted, no help. I moved to another 2019 install and the same thing happened. Now when I try to use that feature, SW crashes. Here's a link to a video showing the phenomenon. Is there a temp file or something that needs to be deleted???

Dropbox - Fastening Feature Crashing.mp4