Posted October 4, 201410 yr Hi, i've installed minecraft forge 9.11.1.965 for inecraft 1.6.4 with the installer but if i try to start the game i get this error: 2014-10-04 19:57:26 [sCHWERWIEGEND] [ForgeModLoader] Unable to launch java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) at java.util.ArrayList$Itr.remove(ArrayList.java:865) at net.minecraft.launchwrapper.Launch.launch(Launch.java:114) at net.minecraft.launchwrapper.Launch.main(Launch.java:27) i have no idea how i can fix that (no other mods installed) can anyone help me? edit: i use java7 update 67
October 4, 201410 yr you are using java 8 edit the profile and check that the executable is set to C:/Program Files/Java/jre7/bin/javaw.exe and not to C:/Program Files/Java/jre8/bin/javaw.exe post the full log
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