I was just playing a modpack, just minding my own business, and it just crashed. Just like that. No idea what caused it. I even made a backup and deleted the world. Still nothing. Here's the report: http://paste.ubuntu.com/9302613/
The thing is, I always do that, and no one ever gets back until like 3 days have passed or so. I'm sorry about posting this on this forum, but I would assume since this forum seems more active than the AtLauncher one, I thought I would receive more help.Your modpack is from AT Launcher, this is FTB forums. So I would suggest to ask in ATLauchers forums for help regarding their modpack...
How exactly would I fix it? My worlds always get corrupted at some point or another. Vanilla or not. It's really strange ;/Well, youre not gonna like it, but basicly your world is corrupted and fixing it is real pain and not 100% sure to work either.
These lines reveal theproblem:
[29/11/2014 12:57:02 PM] [Server thread/ERROR]: Encountered an unexpected exception
[29/11/2014 12:57:02 PM] net.minecraft.util.ReportedException: Loading NBT data