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Hello My minecraft has stop running the error says "Minecraft has stopped running because it encountered a problem; Failed to start game" the rest of the massage says " Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 13/12/12 06:28 PM
Description: Failed to start game

java.lang.IllegalArgumentException: duplicate key: mod_TooManyItems
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:119)
at com.google.common.collect.RegularImmutableMap.<init>(RegularImmutableMap.java:70)
at com.google.common.collect.ImmutableMap$Builder.fromEntryList(ImmutableMap.java:250)
at com.google.common.collect.ImmutableMap$Builder.build(ImmutableMap.java:236)
at com.google.common.collect.Maps.uniqueIndex(Maps.java:638)
at com.google.common.collect.Maps.uniqueIndex(Maps.java:612)
at cpw.mods.fml.common.Loader.identifyMods(Loader.java:336)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:457)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:151)
at net.minecraft.client.Minecraft.a(Minecraft.java:424)
at net.minecraft.client.Minecraft.run(Minecraft.java:756)
at java.lang.Thread.run(Unknown Source)"

Can somebody help me with this?????

Just guessing, but I think you have two installs of TooManyItems.

Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Failed to start game

A full error report has been saved to C:\Users\Jack\AppData\Roaming\.minecraft\crash-reports\crash-2013-01-09_13.52.14-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash



--- BEGIN ERROR REPORT a86056f3 --------
Full report at:
C:\Users\Jack\AppData\Roaming\.minecraft\crash-reports\crash-2013-01-09_13.52.14-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 9/01/13 1:52 PM

-- System Details --
Details:
Minecraft Version: 1.4.6
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_10, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 416868496 bytes (397 MB) / 518979584 bytes (494 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.4.2
OpenGL: null GL version null, null
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

java.lang.IllegalStateException: glGetString(GL_VERSION) returned null - possibly caused by missing current context.
at org.lwjgl.opengl.GLContext.getSupportedExtensions(GLContext.java:187)
at org.lwjgl.opengl.ContextCapabilities.initAllStubs(ContextCapabilities.java:4355)
at org.lwjgl.opengl.ContextCapabilities.<init>(ContextCapabilities.java:4661)
at org.lwjgl.opengl.GLContext.useContext(GLContext.java:352)
at org.lwjgl.opengl.Context.makeCurrent(Context.java:183)
at org.lwjgl.opengl.Display.makeCurrent(Display.java:730)
at org.lwjgl.opengl.Display.makeCurrentAndSetSwapInterval(Display.java:896)
at org.lwjgl.opengl.Display.create(Display.java:860)
at org.lwjgl.opengl.Display.create(Display.java:784)
at net.minecraft.client.Minecraft.a(SourceFile:223)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(SourceFile:515)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT e8173f8f ----------i am having the same problem however i have no mods installed! plz help me.