I am using this modpack http://www.technicpack.net/modpack/details/ultra-modded-survival-pack.266012 and i added DartCraft, JABBA, Magical Crops, Mekanism, Metallurgy 3 and Witchery and now my minecraft crashes and gives this error http://pastebin.com/d2Ssdqq6 .
It would be great if someone could help me fix the error.