weird but that happens sometimes to me with regular maps or heroic map pack and i usually go to the dashboard and back ther and then try it again and if it doesnt work i usually turn it off and try it again and if that doesnt work i blow into the back of it and clean the disk and try again. and if that doesnt work i go play a different game. hope this helped.
hmmm that is weird.... try googling and youtubing your problem and if other people have the same problem there is someone with a solution. If worse comes to worst then contact bungie.
I never had this problem so all I can say is give it a few days and what I just told you.
actually this happens to alot of ppl what it is most likely is ur disk is scratched maybe one time when the map was loading u moved the 360 or sumthing that made it scratch the disk for the loading of assembly people also do this if they dont want to play a map but i dont know a way to get it fixed but to buy a new halo
sometimes mine will say stuff like that, it'll say i don't have the maps and ill have to wait like 5 mins then finally it say that i do have them, it's very stupid
