Before the 1.5 update I had an error upon trying to launch my mod, and I was unable to fix it.  I am getting a different error after the update.  Here it is:

 

 

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: sonick.common.mod.TestMod

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

at cpw.mods.fml.common.Loader.loadMods(Loader.java:512)

at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:160)

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:407)

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

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

at java.lang.Thread.run(Thread.java:680)

Caused by: java.lang.ClassNotFoundException: sonick.common.mod.TestMod

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

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:56)

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

at java.lang.Class.forName(Class.java:247)

at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:446)

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.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(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.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.loadMods(Loader.java:502)

... 5 more

Caused by: java.lang.NullPointerException

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

... 32 more

--- END ERROR REPORT e5393c19 ----------

 

 

 

Thanks!

You might want to give us your code, and it seems like the error is from your class not found.

 

A few questions:

 

1) Are you sure you installed the mod correctly?

2) Are you sure that package includes the mod?

3) Are you sure that if you are using the in-game 'Eclipse' MC launcher you made sure the class had the right name?

4) Are you sure 'sonick.common.mod.TestMod' is the correct path?

 

[On the top of TestMod.java, you must have]

 

package sonick.common.mod;

 

@Mod(modid = "TestMod", name = "TestMod", version = "v0.1")

@NetworkMod(clientSideRequired = true, serverSideRequired = false)

public class TestMod

{ //if you extend or implement add that.

//then add stuff here

}

 

Thats is what I have, but here is the code:

 

 

package sonick.common.mod;

import cpw.mods.fml.common.network.NetworkMod;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.Init;
import cpw.mods.fml.common.Mod.PostInit;
import cpw.mods.fml.common.Mod.PreInit;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import cpw.mods.fml.common.event.FMLPostInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;

@Mod(modid = "TestMod", name = "Sonick's Test Mod", version = "0.1")
@NetworkMod(clientSideRequired = true, serverSideRequired = false)

public class TestMod {

@PreInit
public void preInit(FMLPreInitializationEvent event) {

}

@Init
public void load(FMLInitializationEvent event) {

}

@PostInit
public void postInit(FMLPostInitializationEvent event) {

}

}

 

 

Also this is all that I have right now because I didn't want to do anything else if it wouldn't work.

Hey, I still need help so if anyone can help me it would be greatly appreciated.

You're missing the @Instance and @SidedProxy annotations, not sure if they are required though.

 

Take a look at this tutorial page

I added both @Instance and @SidedProxy, along with the proxy classes, and still got the same error.  Is it possible that there is something wrong with my forge, or even my computer?  I have been getting a similar error for a few different versions so this is very strange.

Thanks so much, it worked!  I have never seen that is how you do it before and now I feel really stupid.