spionsoul

Erased profile and re-installed,as suggested on another forum.Then started mission from beginning ,which was a bit of a pisser as was right towards the end,and seems to have worked. Saved the checkpoints a couple of times,signed out and signed back in and have been able to continue from Resume and checkpoint saves. Here's hoping all remains good.

Quoting from another forum but it describes exactly what's happening to me, and it seems to large number of other people going by various forums. Come 343 get it sorted. "I downloaded the 6gb update today (11/18). Initially it let me resume my campaign (I'm on Mission 15 Guardians in Legendary). Now when I try to resume from my last checkpoint it begins load does the deployment countdown goes to a black screen and the white loading symbol in the left corner and then exits the game and goes to the Xbox dashboard. If I try to replay from a previous saved checkpoint it will let me play but if I advance close to my previous highest checkpoint and die, it also exits the game and goes to the Xbox dashboard. This is more than a little frustrating having played nearly the entire campaign in legendary and now unable to complete because of a bug. I have restarted my Xbox. I have "quit" the game from the dashboard. Neither corrected the problem. Any advice much appreciated."