The mod runs fine when ran through eclipse, but as soon as I try to run it in normal minecraft, it crashes. I have the latest forge installed and it's a mod I made myself. here's the Crash Report and my source code.

 

Crash Report

 

---- Minecraft Crash Report ----

// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

 

Time: 3/21/13 4:42 PM

Description: Failed to start game

 

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: matt/lyoko/world/LyokoPolarSector

at cpw.mods.fml.common.LoadController.transition(LoadController.java:142)

at cpw.mods.fml.common.Loader.initializeMods(Loader.java:682)

at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:206)

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:444)

at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)

at net.minecraft.client.Minecraft.run(Minecraft.java:729)

at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.NoClassDefFoundError: matt/lyoko/world/LyokoPolarSector

at matt.lyoko.CodeLyoko.CodeLyokoLoad(CodeLyoko.java:579)

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 cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:515)

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:314)

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.propogateStateMessage(LoadController.java:165)

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:314)

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:98)

at cpw.mods.fml.common.Loader.initializeMods(Loader.java:681)

... 5 more

Caused by: java.lang.ClassNotFoundException: matt.lyoko.world.LyokoPolarSector

at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:211)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

... 32 more

Caused by: java.lang.ClassFormatError: Duplicate method name&signature in class file matt/lyoko/world/LyokoPolarSector

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:200)

... 34 more

 

 

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

---------------------------------------------------------------------------------------

 

-- System Details --

Details:

Minecraft Version: 1.5.1

Operating System: Windows 7 (amd64) version 6.1

Java Version: 1.7.0_10, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 499002288 bytes (475 MB) / 648740864 bytes (618 MB) up to 932118528 bytes (888 MB)

JVM Flags: 2 total; -Xms512m -Xmx1000m

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 v7.44 FML v5.0.38.600 Minecraft Forge 7.7.0.600 4 mods loaded, 4 mods active

mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized

FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized

Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized

CodeLyoko

 (CodeLyokoMod_1.5.1.zip) Unloaded->Constructed->Pre-initialized->Errored

LWJGL: 2.4.2

OpenGL: Intel® HD Graphics 4000 GL version 4.0.0 - Build 9.17.10.2867, Intel

Is Modded: Definitely; Client brand changed to 'forge,fml'

Type: Client (map_client.txt)

Texture Pack: Default

Profiler Position: N/A (disabled)

Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

 

Source Code

https://github.com/Code-Lyoko-Modding/CodeLyokoMod

 

EDIT: I know it's a null pointer error exception, and I think it's in LyokoPolarSector.java or CodeLyoko.java but I can't find it.

The classloader is choking on one of your mod classes. Read your log.