Minecraft Forums

I have a slight problem. If it's my fault, and I haven't read the forums clearly enough, I apologize in advance.

Now, on to the problem. I simply want to use spawnerGUI, but before I even get to that, ModLoader fails to initialize! Full error report:




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

Minecraft has stopped running because it encountered a problem; ModLoader has failed to initialize.
This error has been saved to C:\Users\My Name\AppData\Roaming\.minecraft\crash-reports\crash-2012-08-09_20.02.31-client.txt for your convenience. Please include a copy of this file if you report this crash to anyone.



--- BEGIN ERROR REPORT b02d007a --------
Generated 8/9/12 8:02 PM

- Minecraft Version: 1.3.1
- Operating System: Windows 7 (amd64) version 6.1
- Java Version: 1.6.0_24, Sun Microsystems Inc.
- Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
- Memory: 387662976 bytes (369 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- ModLoader: Mods loaded: 2
ModLoader 1.3.1
mod_AddonTimeMachine Time Machine Add-on Engaged


java.lang.NoSuchFieldError: A
at mod_AddonTimeMachine.load(mod_AddonTimeMachine.java:32)
at ModLoader.init(ModLoader.java:922)
at ModLoader.addAllRenderers(ModLoader.java:169)
at avx.<init>(RenderManager.java:86)
at avx.<clinit>(RenderManager.java:12)
at net.minecraft.client.Minecraft.a(SourceFile:260)
at net.minecraft.client.Minecraft.run(SourceFile:516)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 1c78d64e ----------

I don't understand why this happens, and it's only bin happening as of update 1.3.1. Any help?

For the spawner, its stupid. you have to be in creative to change the "spawning" (the thing that spawns). I don't know if thats a thing your working on, if its something you didn't know about, or if you don't care. but for a warning for anyone, you'll have to have "cheats" (commands) on your world if you want to use it.

How do I get the Javadoc for Modloader? The download link is broken. Please fix!

Quote from pintio7

How do I get the Javadoc for Modloader? The download link is broken. Please fix!

the Javadoc isnt out yet, it says it in the post

Quote from cmaster1213

the Javadoc isnt out yet, it says it in the post

Ok, thank you for responding!
P.S., I hope risugami gets around to it.

i no install elemental arrows right? http://pastebin.com/3Jz1T8xH

Well hello Mr Bobby Lee .

This was the only way I was ever able to instal a mod, and these are awsome mods! I love this

Hey, can you make your mod work? plz?

the armor stand mod is not working. i cant pick any character except placing armor and its floor
can u fix that bug

Trying to install Modloader but I get an error
Using a fresh install of minecraft,copying the files from the download into minecraft.jar, then deleting Meta-Inf, I get the error:

	 Minecraft has crashed!	
	 ----------------------	
Minecraft has stopped running because it encountered a problem; Exception occured in ModLoader
This error has been saved to C:\Users\CiberNinja\AppData\Roaming\.minecraft\crash-reports\crash-2012-08-10_20.23.24-client.txt for your convenience. Please include a copy of this file if you report this crash to anyone.

--- BEGIN ERROR REPORT bb34d013 --------
Generated 8/10/12 8:23 PM
- Minecraft Version: 1.3.1
- Operating System: Windows Vista (amd64) version 6.0
- Java Version: 1.6.0_14, Sun Microsystems Inc.
- Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
- Memory: 467591904 bytes (445 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- ModLoader: Mods loaded: 1
ModLoader 1.3.1

java.lang.NoClassDefFoundError: forge/NetworkMod
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at ModLoader.addMod(ModLoader.java:319)
at ModLoader.readFromModFolder(ModLoader.java:1413)
at ModLoader.init(ModLoader.java:916)
at ModLoader.addAllRenderers(ModLoader.java:169)
at avx.<init>(RenderManager.java:86)
at avx.<clinit>(RenderManager.java:12)
at net.minecraft.client.Minecraft.a(SourceFile:260)
at net.minecraft.client.Minecraft.run(SourceFile:516)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: forge.NetworkMod
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 19 more
--- END ERROR REPORT e532a8b6 ----------

I was using the yogbox and when i logged in it crashed.

--- BEGIN ERROR REPORT 46372ed2 --------
Generated 8/10/12 9:29 PM

Minecraft: Minecraft 1.2.5
OS: Windows 7 (amd64) version 6.1
Java: 1.6.0_17, Sun Microsystems Inc.
VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: AMD M880G with ATI Mobility Radeon HD 4250 version 3.2.9704 Compatibility Profile Context, ATI Technologies Inc.

java.lang.IllegalArgumentException: Slot 109 is already occupied by nr@2642c966 when adding BlockHutBarracks@6ab45b29
at pb.<init>(Block.java:249)
at agy.<init>(BlockContainer.java:7)
at sn.<init>(BlockChest.java:12)
at BlockHutBarracks.<init>(BlockHutBarracks.java:9)
at mod_MineColony.load(mod_MineColony.java:659)
at ModLoader.init(ModLoader.java:891)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.<init>(ahu.java:77)
at ahu.<clinit>(ahu.java:8)
at net.minecraft.client.Minecraft.a(Minecraft.java:423)
at net.minecraft.client.Minecraft.run(Minecraft.java:790)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT cffb94d7 ----------

Quote from ciberninja

Trying to install Modloader but I get an error
Using a fresh install of minecraft,copying the files from the download into minecraft.jar, then deleting Meta-Inf, I get the error:

	 Minecraft has crashed!	
	 ----------------------	
Minecraft has stopped running because it encountered a problem; Exception occured in ModLoader
This error has been saved to C:\Users\CiberNinja\AppData\Roaming\.minecraft\crash-reports\crash-2012-08-10_20.23.24-client.txt for your convenience. Please include a copy of this file if you report this crash to anyone.

--- BEGIN ERROR REPORT bb34d013 --------
Generated 8/10/12 8:23 PM
- Minecraft Version: 1.3.1
- Operating System: Windows Vista (amd64) version 6.0
- Java Version: 1.6.0_14, Sun Microsystems Inc.
- Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
- Memory: 467591904 bytes (445 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- ModLoader: Mods loaded: 1
ModLoader 1.3.1

java.lang.NoClassDefFoundError: forge/NetworkMod
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at ModLoader.addMod(ModLoader.java:319)
at ModLoader.readFromModFolder(ModLoader.java:1413)
at ModLoader.init(ModLoader.java:916)
at ModLoader.addAllRenderers(ModLoader.java:169)
at avx.<init>(RenderManager.java:86)
at avx.<clinit>(RenderManager.java:12)
at net.minecraft.client.Minecraft.a(SourceFile:260)
at net.minecraft.client.Minecraft.run(SourceFile:516)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: forge.NetworkMod
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 19 more
--- END ERROR REPORT e532a8b6 ----------

You have a mod in your Mods folder that requires forge

Quote from B0bTh3B0b

I was using the yogbox and when i logged in it crashed.

--- BEGIN ERROR REPORT 46372ed2 --------
Generated 8/10/12 9:29 PM

Minecraft: Minecraft 1.2.5
OS: Windows 7 (amd64) version 6.1
Java: 1.6.0_17, Sun Microsystems Inc.
VM: Java HotSpot™ 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: AMD M880G with ATI Mobility Radeon HD 4250 version 3.2.9704 Compatibility Profile Context, ATI Technologies Inc.

java.lang.IllegalArgumentException: Slot 109 is already occupied by nr@2642c966 when adding BlockHutBarracks@6ab45b29
at pb.<init>(Block.java:249)
at agy.<init>(BlockContainer.java:7)
at sn.<init>(BlockChest.java:12)
at BlockHutBarracks.<init>(BlockHutBarracks.java:9)
at mod_MineColony.load(mod_MineColony.java:659)
at ModLoader.init(ModLoader.java:891)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.<init>(ahu.java:77)
at ahu.<clinit>(ahu.java:8)
at net.minecraft.client.Minecraft.a(Minecraft.java:423)
at net.minecraft.client.Minecraft.run(Minecraft.java:790)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT cffb94d7 ----------

Not ModLoader's fault, its a Block ID conflict

i MAY have missed something, but what do you mean by "Drag and Drop the necessary files into the JAR"?

Mob spawner GUI problem. Here's the info:

I would love it if someone helped me on my previous comment. If anyone can.

Quote from creeperking1491

Mob spawner GUI problem. Here's the info:

Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem; Unexpected error
This error has been saved to C:\Users\Owner\AppData\Roaming\.minecraft\crash-reports\crash-2012-08-10_20.55.06-client.txt for your convenience. Please include a copy of this file if you report this crash to anyone.

--- BEGIN ERROR REPORT af422485 --------
Generated 8/10/12 8:55 PM
- Minecraft Version: 1.3.1
- Operating System: Windows 7 (amd64) version 6.1
- Java Version: 1.7.0_02, Oracle Corporation
- Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation
- Memory: 242876784 bytes (231 MB) / 500105216 bytes (476 MB) up to 954466304 bytes (910 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- ModLoader: Mods loaded: 4
ModLoader 1.3.1
mod_RecipeBook 1.3.1
mod_SpawnerGUI 1.3.1
mod_TooManyItems 1.3.1 2012-08-01
- LWJGL: 2.4.2
- OpenGL: Intel® HD Graphics GL version 3.1.0 - Build 8.15.10.2696, Intel
- Is Modded: Probably not
- Type: Client
- Texture Pack: .My 32x32 Pack
- Profiler Position: N/A (disabled)
- World MpServer Entities: 8 total; [atf['Cormac596'/115, l='MpServer', x=2289.83, y=65.62, z=-4887.78], mn['Chicken'/112, l='MpServer', x=2213.59, y=62.45, z=-4938.41], jt['Experience Orb'/114, l='MpServer', x=2291.47, y=57.25, z=-4897.66], mv['Squid'/45087, l='MpServer', x=2243.84, y=49.28, z=-4879.66], mv['Squid'/45088, l='MpServer', x=2244.50, y=49.00, z=-4881.81], mv['Squid'/45089, l='MpServer', x=2244.41, y=49.38, z=-4883.13], mv['Squid'/45057, l='MpServer', x=2228.78, y=50.34, z=-4949.69], mv['Squid'/45058, l='MpServer', x=2240.91, y=47.22, z=-4950.38]]
- World MpServer Players: 1 total; [atf['Cormac596'/115, l='MpServer', x=2289.83, y=65.62, z=-4887.78]]
- World MpServer Chunk Stats: MultiplayerChunkCache: 441
- Forced Entities: 19 total; [ni['item.tile.stonebrick'/63, l='MpServer', x=2111.69, y=42.13, z=-4833.38], ni['item.tile.sand'/61, l='MpServer', x=2111.81, y=41.13, z=-4835.88], ni['item.tile.stonebrick'/62, l='MpServer', x=2111.69, y=42.13, z=-4833.31], jy['Painting'/85, l='MpServer', x=2120.94, y=68.50, z=-4813.00], ni['item.tile.stonebrick'/64, l='MpServer', x=2112.13, y=41.13, z=-4833.13], ni['item.tile.stonebrick'/66, l='MpServer', x=2111.88, y=41.13, z=-4830.66], ni['item.item.egg'/47, l='MpServer', x=2094.13, y=64.13, z=-4906.13], ni['item.tile.stonebrick'/79, l='MpServer', x=2114.88, y=41.13, z=-4838.34], ni['item.item.egg'/96, l='MpServer', x=2160.47, y=47.13, z=-4920.09], ni['item.tile.stonebrick'/80, l='MpServer', x=2114.84, y=41.13, z=-4836.47], ni['item.tile.stonebrick'/81, l='MpServer', x=2114.88, y=41.13, z=-4836.09], mv['Squid'/45089, l='MpServer', x=2244.41, y=49.38, z=-4883.13], mv['Squid'/45088, l='MpServer', x=2244.50, y=49.00, z=-4881.81], mv['Squid'/45058, l='MpServer', x=2240.91, y=47.22, z=-4950.38], mv['Squid'/45057, l='MpServer', x=2228.78, y=50.34, z=-4949.69], atf['Cormac596'/115, l='MpServer', x=2289.83, y=65.62, z=-4887.78], mv['Squid'/45087, l='MpServer', x=2243.84, y=49.28, z=-4879.66], jt['Experience Orb'/114, l='MpServer', x=2291.47, y=57.25, z=-4897.66], mn['Chicken'/112, l='MpServer', x=2213.59, y=62.45, z=-4938.41]]
- Retry Entities: 0 total; []
java.lang.NullPointerException
at GuiMobSpawner.clip(GuiMobSpawner.java:260)
at GuiMobSpawner.d(GuiMobSpawner.java:280)
at apm.m(SourceFile:100)
at GuiMobSpawner.a(GuiMobSpawner.java:162)
at auv.b(EntityRenderer.java:1130)
at EntityRendererProxy.b(EntityRendererProxy.java:20)
at net.minecraft.client.Minecraft.J(SourceFile:607)
at net.minecraft.client.Minecraft.run(SourceFile:535)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT ff93ae1c ----------

its entity error (i think EntityTracker) that risugami is trying to fix.

Quote from tyler1555

Not ModLoader's fault, its a Block ID conflict

I didn't say it was ModLoader's fault! I was wondering if anyone can tell me how to fix it.

I tried to install some mods together, one of which required Mod Loader. That one was the More Stairs mod.(http://www.planetminecraft.com/mod/more-stairs-by-alexlester9-no-modloader-needed/) Even though the link says no modloader needed, when I tried to install it using the Magic Launcher (http://www.minecraftforum.net/topic/939149-launcher-magic-launcher-098-mods-options-news/) it said it required modloader. The others are the Better Third Person mod (http://www.minecraftforum.net/topic/1399744-131-better-third-person-v10/), the Smart Moving mod (http://www.minecraftforum.net/topic/361430-131smp-smart-moving/). For that I used the zip folder, that was included in the download, named Smart Moving Client for ModLoader. And lastly the Optifine mod (http://www.minecraftforum.net/topic/249637-131-optifine-hd-b1-fps-boost-hd-textures-aa-af-and-much-more/) and Mod Loader. I first tried to install these manually, but mc crashed. I then tried it with the Magic Launcher. It said OK next to each of the mods, but it still crashed. I tried installing it with just Mod Loader and it worked. I then tried to install it with Mod Loader and all the mods except the Smart Moving mod, which worked. When I tried to do it with only Mod Loader and the Smart Moving mod it crashed. At first I thought that the problem was with the Smart Moving mod. However in both crash reports (first one with all mods, then only Mod Loader and Smart Moving) I noticed something that said: PM Description: Exception occured in ModLoaderjava.lang.NoClassDefFoundError: PlayerBase . I know that on the forum it says that all the problems might not be solved with the newly released 1.3.1 update, but if anyone can help me, I would appreciate it. I'm not sure if these two crash reports are the same, but here is the first one. (With all the mods installed)

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 8/10/12 7:34 PM
Description: Exception occured in ModLoader

java.lang.NoClassDefFoundError: PlayerBase
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at net.minecraft.move.playerapi.SmartMoving.register(SmartMoving.java:13)
at mod_SmartMoving.<init>(mod_SmartMoving.java:18)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at ModLoader.addMod(ModLoader.java:327)
at ModLoader.readFromClassPath(ModLoader.java:1317)
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 magic.launcher.Launcher.a(Unknown Source)
at magic.launcher.j.a(Unknown Source)
at magic.launcher.q.println(Unknown Source)
at ModLoader.init(ModLoader.java:912)
at ModLoader.addAllRenderers(ModLoader.java:169)
at avx.<init>(RenderManager.java:86)
at avx.<clinit>(RenderManager.java:12)
at net.minecraft.client.Minecraft.a(SourceFile:260)
at net.minecraft.client.Minecraft.run(SourceFile:516)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: PlayerBase
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 35 more

Relevant Details:
- Minecraft Version: 1.3.1
- Operating System: Windows Vista (x86) version 6.0
- Java Version: 1.6.0_33, Sun Microsystems Inc.
- Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
- Memory: 948830128 bytes (904 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
- JVM Flags: 2 total; -Xms1024m -Xmx1024m
- ModLoader: Mods loaded: 2
ModLoader 1.3.1
mod_MoreStairs 1.3.1

And here is the second one. (With only Mod Loader and Smart Moving installed)

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 8/10/12 7:30 PM
Description: Exception occured in ModLoader

java.lang.NoClassDefFoundError: PlayerBase
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at net.minecraft.move.playerapi.SmartMoving.register(SmartMoving.java:13)
at mod_SmartMoving.<init>(mod_SmartMoving.java:18)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at ModLoader.addMod(ModLoader.java:327)
at ModLoader.readFromClassPath(ModLoader.java:1317)
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 magic.launcher.Launcher.a(Unknown Source)
at magic.launcher.j.a(Unknown Source)
at magic.launcher.q.println(Unknown Source)
at ModLoader.init(ModLoader.java:912)
at ModLoader.addAllRenderers(ModLoader.java:169)
at avx.<init>(RenderManager.java:86)
at avx.<clinit>(RenderManager.java:12)
at net.minecraft.client.Minecraft.a(SourceFile:260)
at net.minecraft.client.Minecraft.run(SourceFile:516)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: PlayerBase
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 35 more

Relevant Details:
- Minecraft Version: 1.3.1
- Operating System: Windows Vista (x86) version 6.0
- Java Version: 1.6.0_33, Sun Microsystems Inc.
- Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
- Memory: 950330664 bytes (906 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
- JVM Flags: 2 total; -Xms1024m -Xmx1024m
- ModLoader: Mods loaded: 1
ModLoader 1.3.1

ignore this post