Bug Need help with a failure to launch

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fazt127

New Member
Jul 29, 2019
2
0
0
So to start, I have used feed the beast for a while with no problem, and have a machine capable of running monster with out any issues. I'd say before the start of the new year I was able to launch FTB monster pack, and play no problem. But my classes started to get intense, so I had to quit for a while. Now when I try to launch FTB monster, the launcher disappears like its supposed to, the launcher console gets stuck for a second on the line
"successfully created YggdrasilAuthenticationService"
Then speeds through the rest of the launch, nothing happens, and the launcher window opens back up like I didn't do anything at all. Log pasted below...
Logging in...
Beginning authlib authentication attempt
successfully created YggdrasilAuthenticationService
Login complete.
Checking local assets file, for MC version1.6.4 Please wait!
Setting up native libraries for Monster v Recommended Version MC 1.6.4
Syncing Assets:
Java Path: C:\Program Files\Java\jre1.8.0_31\bin\javaw.exe
Pack: Monster 1.6.4
Setting MinMemory to 256
Setting MaxMemory to 12288
Defaulting PermSize to 256m
Adding Optimization Arguments
Feb 22, 2015 12:12:31 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Feb 22, 2015 12:12:32 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Feb 22, 2015 12:12:32 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
2015-02-22 12:12:32 [INFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2015-02-22 12:12:32 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_31, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre1.8.0_31
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod worldcore.asm.WCFMLLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod appeng.transformer.AppEngCore does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [INFO] [ForgeModLoader] [AppEng] Core Init
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod aroma1997.core.coremod.CoreMod does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod biomesoplenty.asm.BOPFMLLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [INFO] [STDERR] Warning: version of ForgeMultipart-universal-1.6.4-, 1.0.0.250 is newer than request 1.0.0.244
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod calclavia.lib.CalclaviaPluginLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod cofh.asm.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod denoflionsx.denLib.CoreMod.denLibCore does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod denoflionsx.DenPipes.Core.DenPipesCoreMod does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod mcp.mobius.evoc.asm.CoreDescription does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod ic2.core.coremod.IC2core does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod logisticspipes.asm.LogisticsPipesCoreLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod mcp.mobius.mobiuscore.asm.CoreDescription does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod openblocks.OpenBlocksCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod openmods.OpenModsCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod mrtjp.projectred.compatibility.CompatibilityCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod lumien.randomthings.Transformer.RTLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod tconstruct.preloader.TConstructLoaderContainer does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [INFO] [TCon-Preloader] Scalpel. Suction. Lumber axe. CLEAR! *zap*
2015-02-22 12:12:32 [INFO] [TCon-Preloader] Constructing preloader (Modules: [tconstruct.preloader.AccessTransformers, tconstruct.preloader.ASMInterfaceRepair])
2015-02-22 12:12:32 [INFO] [TCon-Preloader] Found a properties file. Attempting load...
2015-02-22 12:12:32 [INFO] [TCon-Preloader] Loaded properties successfully. Using specified settings.
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod universalelectricity.core.UELoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-02-22 12:12:32 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2015-02-22 12:12:32 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2015-02-22 12:12:32 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2015-02-22 12:12:32 [SEVERE] [ForgeModLoader] Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.remove(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0
[i18n] Added 0 enUS to options pane
[i18n] Added 1 cyGB to options pane
[i18n] Added 2 daDK to options pane
[i18n] Added 3 deDE to options pane
[i18n] Added 4 enUS to options pane
[i18n] Added 5 enGB to options pane
[i18n] Added 6 esES to options pane
[i18n] Added 7 fiFI to options pane
[i18n] Added 8 frFR to options pane
[i18n] Added 9 itIT to options pane
[i18n] Added 10 nlNL to options pane
[i18n] Added 11 noNO to options pane
[i18n] Added 12 maHU to options pane
[i18n] Added 13 ptBR to options pane
[i18n] Added 14 ptPT to options pane
[i18n] Added 15 ruRU to options pane
[i18n] Added 16 svSE to options pane
[i18n] Added 17 zhCN to options pane
[i18n] enUS English (US) language file loaded!

Also I should note, any pack that runs on MC version 1.7.10 launches fine, but any pack that launches on version 1.6.4 will experience this same problem.
(This includes DireWolf20(v1.0.23))

I have tried re-installing, moving the installation, and force updating. I am truthfully out of ideas.
 
Never mind I found the solution. For those of you who may stumble on this thread with the same problem:
The error is caused by using Java8, you can either uninstall 8 and install 7, or use the patch for Forge Mod Loader here: http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2206446-forge-1-6-4-1-7-2-java-8-compatibility-patch

Funny, that. I've never had a problem with Java 8... Of course, I never linger on packs using older versions of MC.