Re: Active sim changes automatic

@rosameertens  Are you by any chance tapping the space key while you play?  That automatically switches active sims to the next one on the list.

It's also possible that the game is switching your focus due to some event occurring with one particular sim.  Normally this happens for important events: an age transition, a sim finding out she's pregnant, or even someone catching fire.  But perhaps this function is stuck, even though whatever event initially triggered the camera switch is gone.  You can try deleting the five cache files in your game folder in Documents to see if it helps.  For reference, they are:

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

If this doesn't help, try playing a family in a brand-new save.  Does the active sim still switch outside of your control?