I'm not sure if here is the right place, but I tried making Rey talk to Delores on the Main Street in front the Town Hall after loading a savegame when every character is wanting to get their ending, and I got a crash to desktop with a message saying that it was unable to find character 159 (can't remember) on that room. But after reloading and trying again, it worked...

Also... Did you add new lines to Sandy and Dave? After I left their restaurant, Sandy had some nice words for Dave, and I don't remember that from my previous play throughs.