So I looked through the help section and I can't find anything on this.

I'm working on a world (for personal use, and just for fun.) and last night I was editing it in game, I saved, and then added a couple of roads/sidewalks and a lot. I tried to edit it in game again, and I crashed while entering the game (unlike other problems, I didn't get an error message, it was just "The Sims 3 has stopped working") I waited overnight and decided to try to reload the save. Same thing. I loaded a backup before I added the roads/sidewalks and a lot. It booted edit in game mode. I re added the roads/Sidewalks and the lot, and I don't get why it isn't working, as there is no reason it shouldn't. Has anyone else faced this issue.