[Crankshaft]

I've had a problem for quite some time now, where I build a coop mission on various maps and then email them to friends to host. I always get the error in Static objects load, "Mission Loading Error, Index 635, size 635, the numbers change but its always the same. Most of the others load with no problem, so someone else will host it to see is I can load, and then others get the same error. It's weird, how do I find out what the problem is. I can go into multiplayer and load the mission I sent them and it plays just fine, loads, and fly's smoothly. Any idieas?