World Adventures crashes back to The Sims 3

@suecorn13349  Just to clarify, if you've installed all of these packs on the same computer, then they're all active when you play.  It doesn't matter which one you click on to launch the game, they're all active.  So the issue may not be with World Adventures exactly, but the cumulative effect of all three packs.  Of course, you can disable specific packs in the launcher if you have a Windows/Origin install, but if they're checked off, they're all present in-game.

World Adventures itself isn't particularly demanding, but the travel transitions can be.  Is this when your game is crashing, when you send your sims traveling?  If not, what's happening in-game when it crashes?  How long can you play before it crashes?  Is this just with one save, or with all of them?  It's fine if you don't notice a pattern—the fact that the crashing is random would also be useful information.

Error 12 is an out-of-resources condition.  It just means that Sims 3 ran out of something (usually memory, sometimes video memory, maybe something else) and couldn't keep running.  The question then becomes why, and when, hence the above questions.

While this is going on, please be sure to delete the five cache files in your game folder in Documents.  (The full path is Documents\Electronic Arts\The Sims 3.)  These files should be deleted regularly anyway, as they tend to clog up with stale data.  When you're troubleshooting, as now, it's best to delete them every time you quit the game.  For reference, the files are:

• CASPartCache.package
• compositorCache.package
• scriptCache.package
• simCompositorCache.package
• socialCache.package

Please also check the folder labeled CurrentGame, in the same file path, and delete anything you find there.  This folder should always be empty unless Sims 3 is actually running, but sometimes its contents don't get removed after the game crashes.