Game goes back to Launcher after opening a world

[Potato_Shooter]

Hi

 

I'm not quite sure if this is the right place to post this, but I thought that this is the best place I could get some help.
 
I've been playing the following modpack http://www.technicpack.net/modpack/details/ultra-modded-survival-pack.266012 for quite some time now in only one world and today this world crashed and I can't open it. This means if I open the world it crashes and I get taken back to the Technic Launcher.
It happens everytime I try to open my world and the crash report also seems to be the same.
These are the links to the reports, I don't know why, but there are always two:

 

Server: http://pastebin.com/raw.php?i=kN6hhxZb

 

Client: http://pastebin.com/raw.php?i=usU2NP4p

 

I think my PC knowledge should be good enough to do some things with MC Edit, but I don't know what to do

 

Thanks for the advice in advance

 

EDIT: When it crashed I was in an OreSpawn world with quite some NPCs (mobs and villagers) around me, if that is important.

 

EDIT 2: It works now again!!! My little brother suggested I should just go back to the overworld, which I managed to do with MC Edit, and now everything works fine again!!!

Edited June 24, 2014 by Potato_Shooter

[freakachu]

there is no official support for platform packs.  you couldn't find the place for this post because there isn't one.  if you're having an issue with a custom pack, contact the pack author.