Object Error

I know it's not ideal for everyone, but what stopped ALL of the error box pop ups for me was cleaned neighborhoods. I made mine myself with the exception of Pleasantview (I got that one from Mod the Sims), but if you google Sims 2 cleaned neighborhoods, there are a few different options, depending on which things you care about. With most, you just need to delete the original neighborhoods and replace them with the cleaned ones. 

I haven't had a single error box pop up since I replaced them. I don't know what EA did, but clearly they added something that's bugged.