So problem as stated above. I open ftb launcher and launch Direwolf, the launcher disappears as usual but then re-appears almost instantly with red text in the console saying 2014-08-20 18:34:25 [SEVERE] [ForgeModLoader] Unable to launch with java.util.ConcurrentModificationException.
Any help appreciated. I already tried to fix the problem by updating Java and a fresh install of ftb also downloading Direwolf with firewalls down just in case.
Here is pastebin http://pastebin.com/Bu0rajW4
Any help appreciated. I already tried to fix the problem by updating Java and a fresh install of ftb also downloading Direwolf with firewalls down just in case.