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Please Help! Canno't open FTB Ultimate Pack!

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  • Members
  • Pip
  • 1 posts
  • IGN:Tacoman824
  • Modpack:FTB Ultimate

Whenever I try to open Ultimate pack it starts loading but then this happens, 


      [12:23:40] [ERROR] ClassLoader.defineClass1:-2->MinecraftLauncher.main214 Unhandled eroor launching minecraft:java.lang.NoClassDefFoundError: Ig 


Please help I dont know how to fix it!



    Advanced Member

  • Administrators
  • 262 posts
  • IGN:GameStopper
  • Modpack:FTB Ultimate

Options --> Force Update, then launch the pack.


If that doesn't work, navigate to C:/Users/YOURUSERNAMEHERE/AppData/Roaming/.feedthebeast/Ultimate/minecraft and delete everything except the Saves folder, then launch the pack.

My username is digitallyApocalyptic. I contribute where I can on the wiki and I've previously built pretty much the entirety of Category:Twilight Forest. I play FTB Ultimate, some games on Steam, and I follow MS Paint Adventures.

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