[B3.1] Crash on huge map

[xxluke]

I tried to play the very huge map District 25. The problem is, that the game crashes everytime I load it.
The first time I loaded the map the game crashes when the progress bar was full and the second time I started it I saw the Intro for 2 seconds.

When my computer is too bad for the map there should be an error-message, but no crash

CrashLog:
http://pastebin.com/c9ccjYA3

(Please add [hide]-BB-Code for spoiler.)