I've created a diagram with initial positions, then ran the 'Geo - Partial Overlapping Links' algorithm. So far everything is fine and nothing has taken any significant time to process but when I try to stop editing diagram and save my edits that processing icon just rotates endlessly until I close ArcMap rather than wait for it to respond.
The only difference I can think of between this and other schematic diagrams I've created is that this one is created data using a database connection rather than a file geodatabase.
Fortunately, it looks like the changes I've made ARE getting saved, but it still requires me to kill the program - reopen it - and unlock my diagram each time I make changes. What is causing this issue?