Re: Sims can't go upstairs
If the stairs work in a vanilla game and don't work when you have CC in, what that means to me is that you have a bad or broken CC item causing the problem. I have downloaded bad CC before and I have had other CC that got broken by an update. So, you really need to hunt it down and remove it from your mods folder. Otherwise, it will cause you more problems in the future. Given that your game seems to be working normally other than this one thing, it will be hard to find. You can try the 50/50 method or try things one at the time until you find the item causing the problem. It depends on how much CC you have how you go about it.
Hope this helps.
