Plutonium

I fix it, you have to delete the launcher and the folder and re install plutonium.exe

The error drop is
Exception Code: 0xC0000005
Exception Address: 0x0055BA59

I dont understand why, but one of our friends can play with us in BO2 zombies, he can join the lobby but when the match begin in the loading screen the game close with out any error, the same problem come to us when he is the leader party, the match begin and in the loading the screen the game close for me and the others 2 players.