Crashin multiplayer problem

Hey ppl. I just bought the game and alldlc ps3. The game keeps crashing when playing with split screen or online. I tryed to find a solution for this in the web but i didnt find any. What i can find is that lots of ppl had this glitch and quitted the game in early years. Someone told its a glitch in the autosave function messing up the ram and crashing the game over time when u reach certain autosave point. I cant find any solution for this. Pls help .

Duplicate thread.