silver593

Thats the problem. There are no errors.

I have downloaded the tekkit 2.0.1 server client and we have been playing on it for a couple weeks. Today, we both started up Hamachi, he and I were on the same network and both had A direct tunnel to each other.(And yes he entered the IP correctly.) I was the only one who could connect to the server. Yes, I know this is a very generic issue, and I am sure many of you are going to ask for more information; which I can not provide anymore. We tried connecting to a vanilla server on my computer with the same Hamachi clients and it worked. I've read the entire server console and there are zero errors. I'm 99% sure its not Hamachi; considering he could still connect to my vanilla server. I'm planning on getting A new Hamachi network and client to see if that works; knowing that this problem is so generic there is a small chance someone will be able to solve it. If you have encountered this problem and know how to solve please let me know.

Re: Where do i obtain the tekkit 128x128 sphax BDcraft texture pack? Thanks I found it!

Re: Where do i obtain the tekkit 128x128 sphax BDcraft texture pack? Where is that I cant seem to find it?

Re: Where do i obtain the tekkit 128x128 sphax BDcraft texture pack? Yes that's the one. Except the one Duncan uses is edited to work with all of the tekkit mods. It use to be somewhere on the technic launcher forums but I can not find it their anymore.

I remember downloading the texture that is compatible with all the tekkit mods on this site but can't find it. Can anyone provide a link or directions to its whereabouts?

I'm new to the forums so forgive me if I am posting this in the wrong area. When ever my friend tries to join my 2.1.1 tekkit server we receive an error saying, "can't verify minecraft username." If anyone knows what's or why this is happening please let me know.

Thank you for helping and not being rude!

I have downloaded the zip file containing the tekkit server files. When I run the batch file the console gives me these errors; I'm unsure why and do not know how to fix it. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader init FINE: ModLoader Server 1.1 Initializing... Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[1]Buildcraft-2.2.12-b1.1R3.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftBuilders 2.2.12" from mod_BuildCraftBuilders.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftFactory 2.2.12" from mod_BuildCraftFactory.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftEnergy 2.2.12" from mod_BuildCraftEnergy.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftCore 2.2.12" from mod_BuildCraftCore.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftTransport 2.2.12" from mod_BuildCraftTransport.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[1]Industrialcraft2-1.71-cb1.1R4-r4.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_IC2 v1.71" from mod_IC2.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[1]Redpower-all-2.0p4d-b1.1R3.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerLighting 2.0pr4d" from mod_RedPowerLighting.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerArray 2.0pr4d" from mod_RedPowerArray.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerMachine 2.0pr4d" from mod_RedPowerMachine.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerLogic 2.0pr4d" from mod_RedPowerLogic.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerWorld 2.0pr4d" from mod_RedPowerWorld.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerCore 2.0pr4d" from mod_RedPowerCore.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerWiring 2.0pr4d" from mod_RedPowerWiring.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[2]Additionalpipes-32.3-bukkit-b1.1R4-r1.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_zAdditionalPipes Rev32.3" from mod_zAdditionalPipes.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[2]AdvancedMachines_3.6_bukkit.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Failed to load mod from "mod_IC2AdvancedMachines.class" Apr 28, 2012 1:14:39 PM ModLoader addMod FINER: THROW java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0 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$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at net.minecraft.server.ModLoader.addMod(ModLoader.java:172) at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:929) at net.minecraft.server.ModLoader.init(ModLoader.java:683) at net.minecraft.server.ModLoader.Init(ModLoader.java:1357) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411) at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader ThrowException SEVERE: Unexpected exception java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0 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$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at net.minecraft.server.ModLoader.addMod(ModLoader.java:172) at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:929) at net.minecraft.server.ModLoader.init(ModLoader.java:683) at net.minecraft.server.ModLoader.Init(ModLoader.java:1357) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411) at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) Apr 28, 2012 1:14:39 PM ModLoader init FINER: THROW java.lang.RuntimeException: Exception occured in ModLoader at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292) at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1297) at net.minecraft.server.ModLoader.addMod(ModLoader.java:193) at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:929) at net.minecraft.server.ModLoader.init(ModLoader.java:683) at net.minecraft.server.ModLoader.Init(ModLoader.java:1357) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411) at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0 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$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at net.minecraft.server.ModLoader.addMod(ModLoader.java:172) ... 6 more Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader ThrowException SEVERE: Unexpected exception java.lang.RuntimeException: Exception occured in ModLoader at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292) at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1297) at net.minecraft.server.ModLoader.addMod(ModLoader.java:193) at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:929) at net.minecraft.server.ModLoader.init(ModLoader.java:683) at net.minecraft.server.ModLoader.Init(ModLoader.java:1357) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411) at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0 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$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at net.minecraft.server.ModLoader.addMod(ModLoader.java:172) ... 6 more If anyone knows why this happens please let me know, it will be most appreciated.

Ok, sorry I am new to the threads.

I have downloaded the zip file containing the tekkit server files. When I run the batch file the console gives me these errors; I'm unsure why and do not know how to fix it. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader init FINE: ModLoader Server 1.1 Initializing... Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[1]Buildcraft-2.2.12-b1.1R3.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftBuilders 2.2.12" from mod_BuildCraftBuilders.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftFactory 2.2.12" from mod_BuildCraftFactory.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftEnergy 2.2.12" from mod_BuildCraftEnergy.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftCore 2.2.12" from mod_BuildCraftCore.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_BuildCraftTransport 2.2.12" from mod_BuildCraftTransport.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[1]Industrialcraft2-1.71-cb1.1R4-r4.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_IC2 v1.71" from mod_IC2.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[1]Redpower-all-2.0p4d-b1.1R3.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerLighting 2.0pr4d" from mod_RedPowerLighting.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerArray 2.0pr4d" from mod_RedPowerArray.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerMachine 2.0pr4d" from mod_RedPowerMachine.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerLogic 2.0pr4d" from mod_RedPowerLogic.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerWorld 2.0pr4d" from mod_RedPowerWorld.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerCore 2.0pr4d" from mod_RedPowerCore.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_RedPowerWiring 2.0pr4d" from mod_RedPowerWiring.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[2]Additionalpipes-32.3-bukkit-b1.1R4-r1.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Mod Loaded: "mod_zAdditionalPipes Rev32.3" from mod_zAdditionalPipes.class Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Adding mods from C:\Users\Keegan\Desktop\Desktop\1.1.0 mods\tekkit server\Tekkit_Server_2.1.1\mods\[2]AdvancedMachines_3.6_bukkit.zip Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader readFromModFolder FINER: Zip found. Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader addMod FINE: Failed to load mod from "mod_IC2AdvancedMachines.class" Apr 28, 2012 1:14:39 PM ModLoader addMod FINER: THROW java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0 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$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at net.minecraft.server.ModLoader.addMod(ModLoader.java:172) at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:929) at net.minecraft.server.ModLoader.init(ModLoader.java:683) at net.minecraft.server.ModLoader.Init(ModLoader.java:1357) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411) at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader ThrowException SEVERE: Unexpected exception java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0 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$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at net.minecraft.server.ModLoader.addMod(ModLoader.java:172) at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:929) at net.minecraft.server.ModLoader.init(ModLoader.java:683) at net.minecraft.server.ModLoader.Init(ModLoader.java:1357) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411) at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) Apr 28, 2012 1:14:39 PM ModLoader init FINER: THROW java.lang.RuntimeException: Exception occured in ModLoader at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292) at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1297) at net.minecraft.server.ModLoader.addMod(ModLoader.java:193) at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:929) at net.minecraft.server.ModLoader.init(ModLoader.java:683) at net.minecraft.server.ModLoader.Init(ModLoader.java:1357) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411) at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0 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$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at net.minecraft.server.ModLoader.addMod(ModLoader.java:172) ... 6 more Apr 28, 2012 1:14:39 PM net.minecraft.server.ModLoader ThrowException SEVERE: Unexpected exception java.lang.RuntimeException: Exception occured in ModLoader at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292) at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1297) at net.minecraft.server.ModLoader.addMod(ModLoader.java:193) at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:929) at net.minecraft.server.ModLoader.init(ModLoader.java:683) at net.minecraft.server.ModLoader.Init(ModLoader.java:1357) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411) at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0 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$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at net.minecraft.server.ModLoader.addMod(ModLoader.java:172) ... 6 more If anyone knows why this happens please let me know, it will be most appreciated.