Minecraft Forums

Quote from Nathan047»

Hi. I have been trying to load a modpack, but am having some problems. I first was not sure what was going on, because I clicked "Play" and nothing would happen (minecraft would not boot and I had no crash report), but then I choose to leave the launcher open when minecraft booted and I got this error:

Sep 17, 2015 8:31:47 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Sep 17, 2015 8:31:47 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Sep 17, 2015 8:31:47 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
2015-09-17 20:31:47 [INFO] [ForgeModLoader] Forge Mod Loader version 6.4.50.1,345 for Minecraft 1.6.4 loading
2015-09-17 20:31:47 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_25, running on Windows 10:amd64:10.0, installed at C:\Users\mecca\Documents\Minecraft\Engine\runtime\jre-x64\1.8.0_25
2015-09-17 20:31:48 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:48 [WARNING] [ForgeModLoader] The coremod worldcore.asm.WCFMLLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:48 [WARNING] [ForgeModLoader] The coremod biomesoplenty.asm.BOPFMLLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [INFO] [STDERR] Warning: version of ForgeMultipart-universal-1.6.4-, 1.0.0.250 is newer than request 1.0.0.244
2015-09-17 20:31:49 [INFO] [STDERR] Warning: version of CodeChickenLib-universal-1.6.4-, 1.0.0.62 is newer than request 1.0.0.61
2015-09-17 20:31:49 [WARNING] [ForgeModLoader] The coremod denoflionsx.CreeperCollateral.CoreMod.CCCore does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [WARNING] [ForgeModLoader] The coremod denoflionsx.denLib.CoreMod.denLibCore does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [WARNING] [ForgeModLoader] The coremod atomicstryker.dynamiclights.common.DLFMLCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [WARNING] [ForgeModLoader] The coremod glenn.gases.core.EDFMLLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [WARNING] [ForgeModLoader] The coremod glenn.gasesframework.core.EDFMLLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [WARNING] [ForgeModLoader] The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [WARNING] [ForgeModLoader] The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [WARNING] [ForgeModLoader] The coremod mrtjp.projectred.compatibility.CompatibilityCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2015-09-17 20:31:49 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2015-09-17 20:31:49 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2015-09-17 20:31:49 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2015-09-17 20:31:49 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2015-09-17 20:31:49 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
2015-09-17 20:31:49 [INFO] [STDOUT] Loaded 40 rules from AccessTransformer config file fml_at.cfg
2015-09-17 20:31:50 [SEVERE] [ForgeModLoader] Unable to launch
java.lang.RuntimeException: java.lang.NullPointerException
at cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:128)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:111)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
Caused by: java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:191)
at com.google.common.hash.AbstractByteHasher.putBytes(AbstractByteHasher.java:69)
at com.google.common.hash.AbstractStreamingHashFunction.hashBytes(AbstractStreamingHashFunction.java:57)
at cpw.mods.fml.common.patcher.ClassPatchManager.applyPatch(ClassPatchManager.java:101)
at cpw.mods.fml.common.patcher.ClassPatchManager.getPatchedResource(ClassPatchManager.java:66)
at cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.getFieldType(FMLDeobfuscatingRemapper.java:225)
at cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.parseField(FMLDeobfuscatingRemapper.java:202)
at cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.setup(FMLDeobfuscatingRemapper.java:163)
at cpw.mods.fml.common.asm.FMLSanityChecker.injectData(FMLSanityChecker.java:245)
at cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:123)
... 2 more

Every time I went to load it I got the exact same error. Thanks for your reply!

FYI:

1. You posted in the wrong section

2. If your using a third-party pack, check their forums first.