@Shellie3713 The first thing to do is delete the five cache files in your TS3 game folder in Documents. These caches should be cleared regularly even in the absence of any game issues, as they'll fill up with stale data. For reference, they are:
- CASPartCache.package
- compositorCache.package
- scriptCache.package
- simCompositorCache.package
- socialCache.package
If that alone doesn't help, try reassigning her outfits in Create-a-Sim (or use NRaas MasterController's Stylist function, if you have the mod). The teen may have a broken outfit that's preventing her from aging up properly; changing her clothes and hair for all outfits would fix that.
To reach CAS, bring up the cheats console (crtl-shift-c) and enter "testingcheatsenabled true" without quotes. Then shift-click on the sim and select Edit in Create a Sim. When you're done, be sure to disable testingcheats (enter "testingcheatsenabled false"). For MasterController, no cheats are necessary—click on the sim and select NRaas > MC > Stylist.
If changing her outfits doesn't help, this sim might need a more comprehensive reset: Go to Edit Town and evict the teen's household and then move it back in. To be more thorough, you can evict the household, save the house to the bin, bulldoze the lot, replace the house with its bin copy, and move the family back in. If you do all of this in one Edit Town session, without saving the
sims to the bin and replacing them, they'll keep their jobs and relationships. Active sims will lose their promised wishes and opportunities, but if the teen isn't in your active household, she won't have these anyway.
After every step, it's a good idea to use "save as" and rename the save slightly, then quit (without saving) to desktop, delete the five cache files, and reload. Sometimes it takes a couple of tries to get a stubborn sim through an age transition as well.
