I've just starting modding and I'm having some trouble with my mod. It runs fine in Eclipse, but after recompiling and reobfuscating it crashed when I add it to the mods folder.

 

Crash is here:

 

---- Minecraft Crash Report ----

// This doesn't make any sense!

 

Time: 8/10/13 12:28 PM

Description: There was a severe problem during mod loading that has caused the game to fail

 

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: overcode.morestuffmod.Base

at cpw.mods.fml.common.LoadController.transition(LoadController.java:149)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:520)

at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:182)

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:470)

at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:796)

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:57)

at net.minecraft.launchwrapper.Launch.main(Launch.java:18)

Caused by: java.lang.ClassNotFoundException: overcode.morestuffmod.Base

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:179)

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

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

at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:58)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Unknown Source)

at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:457)

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:194)

at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:174)

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:105)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:510)

... 10 more

Caused by: java.lang.NullPointerException

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:171)

... 38 more

 

 

It could be that the mod is packaged wrong, I couldn't find a simple tutorial. It might not be relevant but here it is just in case. It goes like Mod.zip > morestuffmod > .class files +  client folder with ClientProxy.class

The textures are Mod.zip > assets > morestuffmod > textures > items > the .png files + thumbs.db

 

 

 

 

 

It sais it couldn't find the class "overcode.morestuffmod.Base". Are you using a API for your mod? If so, make sure your mod gets loaded after the API.

Nope, not using an API. Base.class is my main mod class.

Check if the Mod.zip contains the Base class.

Base.class is in the morestuffmod folder with the other .class files

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: overcode.morestuffmod.Base

 

From seeing that it is saying that the mod file directory is overcode/morestuffmod/Base.java in eclipse. When you package your mod it should read as: Mod.zip > overcode > morestuffmod > Base.class. Modding in general is very picky when it comes to file directory listing.

It works, thanks!