[sims3] Sims disappeared after save as/save

@nthac  Here's a good guide to installing mods:

https://modthesims.info/wiki.php?title=Game_Help:Installing_Sims_3_Package_Files/Setup_and_Files

Since you're using mods, please add MasterController as well.  From now until your save is running properly again, delete the five cache files in Documents > Electronic Arts > The Sims 3 each time you quit the game.  For reference, these are:

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

Once you load your save, let the game clock run for a few sim-minutes.  Then click on City Hall and select NRaas > MasterController > Town Options > Reset Everything.  This may take a few minutes to run, depending on the speed of your hardware; it'll let you know when it's done.  Let the game clock run for a few more sim-minutes, use "Save as" to rename the save (so the original remains intact as a backup), quit, delete the cache files again, and reload.

If this doesn't work while your main household is active for one reason or another, you can try it with a different household active instead, then switch back after you've quit and reloaded.