Minecraft There was a severe problem during mod loading that has

Met a jour JAVA, si tu veut être sur désinstalle le et télécharge la dernière version sur leur site offiiciel

j'ai désinstaller et réinstaller java mais sa marche toujours pas
(java 64 bits)

Peut le problème est venue lors de l'installation, te serait tu tromper dans l'ordre ?

- commence d'abord avec minecraft version d'origine sans mod (comme si c'était la premiers fois que tu l'avais).

- installe ensuite Forge (n'oublie pas de lancer le jeu après l'installation de Forge sans avoir mis de mods)

- met tes mods, et bon jeu ^^

j'ai tout recommencée depuis le début mais sa marche toujours pas
de plus certain mods comme flans mod ou pixelmon marche très bien

j'ai aussi forge 1.6.4
et quand je l'utilise j'aise message d'erreur

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 11/06/14 20:03
Description: Initializing game

java.lang.NoClassDefFoundError: thehippomaster/MutantCreatures/packet/PacketPipeline
at thehippomaster.MutantCreatures.MutantCreatures.<clinit>(MutantCreatures.java:377)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:462)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:201)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:181)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:112)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:511)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:183)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:473)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:808)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
Caused by: java.lang.ClassNotFoundException: thehippomaster.MutantCreatures.packet.PacketPipeline
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 36 more
Caused by: java.lang.NoClassDefFoundError: io/netty/handler/codec/MessageToMessageCodec
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:178)
... 38 more
Caused by: java.lang.ClassNotFoundException: io.netty.handler.codec.MessageToMessageCodec
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:97)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 42 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at thehippomaster.MutantCreatures.MutantCreatures.<clinit>(MutantCreatures.java:377)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:462)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:201)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:181)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:112)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:511)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:183)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:473)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:808)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

-- System Details --
Details:
Minecraft Version: 1.6.4
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.7.0_60, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 123889240 bytes (118 MB) / 436207616 bytes (416 MB) up to 954728448 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v8.11 FML v6.4.49.965 Minecraft Forge 9.11.1.965 4 mods loaded, 4 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
FML{6.4.49.965} [Forge Mod Loader] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed
Forge{9.11.1.965} [Minecraft Forge] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed
MutantCreatures{1.4.5} [Mutant Creatures] (MutantCreatures-1.7.2-1.4.5.jar) Unloaded
Launched Version: 1.6.4-Forge9.11.1.965
LWJGL: 2.9.0
OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 10.18.10.3621, Intel
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Pack: Default
Current Language: Français (France)
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

tu a installer la version 1.7.2 de mutant creature alors que cette version de minecraft est 1.6.4 ^^ modifie cela et sa devrai marcher.

j'ai chercher plusieurs site proposant ce mod mais aucun mod n'a fonctionner quel site me conseiller vous

Bonjours à vous je vous présente mon problème aujourd'hui.
Je me retrouve avec exactement la même chose sur un mods pack créé par des potes. Quelqu'un aurai t'il une solution?

---- Minecraft Crash Report ----
// Don't do that.

Time: 03/04/15 18:10
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: java/lang/ReflectiveOperationException
at cpw.mods.fml.common.LoadController.transition(LoadController.java:162)
at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:515)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:239)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.NoClassDefFoundError: java/lang/ReflectiveOperationException
at naruto1310.extendedWorkbench.ExtendedWorkbench.load(ExtendedWorkbench.java:193)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:513)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:208)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:513)
... 10 more
Caused by: java.lang.ClassNotFoundException: java.lang.ReflectiveOperationException
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:106)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 37 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Mac OS X (x86_64) version 10.10.1
Java Version: 1.6.0_65, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 174732312 bytes (166 MB) / 309284864 bytes (294 MB) up to 4281597952 bytes (4083 MB)
JVM Flags: 5 total; -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.85.1291 Minecraft Forge 10.13.2.1291 Optifine OptiFine_1.7.10_HD_B5 38 mods loaded, 38 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized
FML{7.10.85.1291} [Forge Mod Loader] (forge-1.7.10-10.13.2.1291.jar) Unloaded->Constructed->Pre-initialized
Forge{10.13.2.1291} [Minecraft Forge] (forge-1.7.10-10.13.2.1291.jar) Unloaded->Constructed->Pre-initialized
CodeChickenCore{1.0.2.9} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized
NotEnoughItems{1.0.2.15} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.2.15-universal.jar) Unloaded->Constructed->Pre-initialized
PlayerAPI{1.2} [Player API] (minecraft.jar) Unloaded->Constructed->Pre-initialized
SmartCore{1.0} [Smart Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized
lucky{5.1.0} [Lucky Block] ([1-7-10]_Lucky_Block_v5-1-0.jar.zip) Unloaded->Constructed->Pre-initialized
DamageIndicatorsMod{3.2.3} [Damage Indicators] ([1.7.10]DamageIndicatorsMod-3.2.3.jar) Unloaded->Constructed->Pre-initialized
extendedWorkbench{1.2.1.1} [Extended Workbench] ([1.7.10]ExtendedWorkbench v1.2.1.1.jar) Unloaded->Constructed->Errored
AppleCore{1.1.0} [AppleCore] (AppleCore-mc1.7.10-1.1.0.jar) Unloaded->Constructed->Pre-initialized
Backpack{2.0.1} [Backpack] (Backpacks-Mod.jar) Unloaded->Constructed->Pre-initialized
BattleTowers{1.5.1} [Battle Towers] (BattleTowers-1.7.10.jar) Unloaded->Constructed->Pre-initialized
Baubles{1.0.1.8} [Baubles] (Baubles-1.7.10-1.0.1.8.jar) Unloaded->Constructed->Pre-initialized
BiblioCraft{1.10.0} [BiblioCraft] (BiblioCraft[v1.10.0][MC1.7.10].jar) Unloaded->Constructed->Pre-initialized
chisel{1.5.7} [Chisel] (Chisel-1.7.10-1.5.7.jar) Unloaded->Constructed->Pre-initialized
colourfulportalsmod{1.4.2} [Colourful Portals] (ColourfulPortals-1.4.2_for_1.7.X.jar) Unloaded->Constructed->Pre-initialized
MoCreatures{6.3.1} [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod v6.3.1.zip) Unloaded->Constructed->Pre-initialized
eplus{3.0.2-d} [Enchanting Plus] (EnchantingPlus-1.7.10-3.0.2-d.jar) Unloaded->Constructed->Pre-initialized
extrabuttons{1.7.2.0} [ExtraButtons] (extrabuttons-1.7.2.0.jar) Unloaded->Constructed->Pre-initialized
FastCraft{1.19} [FastCraft] (fastcraft-1.19.jar) Unloaded->Constructed->Pre-initialized
iChunUtil{4.0.0} [iChunUtil] (iChunUtil-4.0.0.jar) Unloaded->Constructed->Pre-initialized
Hats{4.0.1} [Hats] (Hats-4.0.1.jar) Unloaded->Constructed->Pre-initialized
inventorytweaks{1.58-147-645ca10} [Inventory Tweaks] (InventoryTweaks-1.58-147.jar) Unloaded->Constructed->Pre-initialized
IronChest{6.0.62.742} [Iron Chest] (Iron-Chests-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized
journeymap{5.0.1} [JourneyMap] (JourneyMap5.0.1_Unlimited_MC1.7.10.jar) Unloaded->Constructed->Pre-initialized
mythril{1.6} [Mythril mod] (mithril_mod-1.7.2-1.6.jar) Unloaded->Constructed->Pre-initialized
Morpheus{1.7.2-1.@MINOR.15} [Morpheus] (Morpheus-1.7.10-1.5.15.jar) Unloaded->Constructed->Pre-initialized
harvestcraft{1.7.10g} [Pam's HarvestCraft] (Pam's HarvestCraft 1.7.10g.jar) Unloaded->Constructed->Pre-initialized
RedstonePasteMod{1.6.2} [Redstone Paste] (RedstonePasteMod-1.7.10-1.6.2.jar) Unloaded->Constructed->Pre-initialized
ReiMinimap{1.7.10} [Rei's Minimap] (Reis-Minimap-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized
slabcraftmod{1.7} [Slabcraft] (Slabcraftmod 1.7 - 1.7.10 Forge.jar) Unloaded->Constructed->Pre-initialized
SmartMoving{15.3} [Smart Moving] (SmartMoving-1.7.10-15.3.jar) Unloaded->Constructed->Pre-initialized
SmartRender{2.1} [Smart Render] (SmartRender-1.7.10-2.1.jar) Unloaded->Constructed->Pre-initialized
TwoTility{1710.1.3} [TwoTility] (twotility-1710.1.3.jar) Unloaded->Constructed->Pre-initialized
AS_UpdateCheck{1.1.6} [AtomicStryker Update Check Mod] (UpdateCheckerMod-1.7.10.jar) Unloaded->Constructed->Pre-initialized
VanillaPlus{1.4.1} [VanillaPlus] (Vanilla-Plus-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized
HungerOverhaul{1.7.10-beta.5.jenkins47} [Hunger Overhaul] (HungerOverhaul-1.7.10-beta.5.jar) Unloaded->Constructed->Pre-initialized