THANKS SWX for employing my ER! This is great and I've needed it for years! Got to use it for the first time today.
For those who haven't used it yet or don't know what it is, right click on Connections and it's there. It takes a little while to run, but will let you know of any bodies that are not constrained properly.
The contact visualization plot can help with this, but when you have hundreds of bodies, it's worthless.