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Here is the error that i'm getting when i run a tekkit server, please help me with this problem as soon as possible, thanks :)

20:21:42 [iNFO] Mod Loaded: mod_zAdditionalPipes Rev32.3

>Failed to load mod from "mod_IC2AdvancedMachines.class"

>java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMac

hines : 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)

20:21:42 [sEVERE] Unexpected exception

java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMach

ines : 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)

>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_IC2A

dvancedMachines : 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

20:21:42 [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_IC2A

dvancedMachines : 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

>java.lang.RuntimeException: ModLoader has failed to initialize.

    at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292)

    at net.minecraft.server.ModLoader.init(ModLoader.java:715)

    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.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)

    ... 4 more

Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2A

dvancedMachines : 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

20:21:42 [sEVERE] Unexpected exception

java.lang.RuntimeException: ModLoader has failed to initialize.

    at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292)

    at net.minecraft.server.ModLoader.init(ModLoader.java:715)

    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.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)

    ... 4 more

Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2A

dvancedMachines : 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)

5 answers to this question

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Posted

Im having the same problem. im trying to upgrade java from the recommended version (6u32 or 6u36 not sure which) to JRE 7u3. I dont think thats the problem though. everything else runs fine.

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  • Forum Administrators
Posted

ASAP GUYS

I AM ON A MISSION

A MISSION TO NOT LOOK AT ANYTHING EVER, AND RUN INTO THE FORUMS SCREAMING.

  • 0
Posted

ASAP GUYS

I AM ON A MISSION

A MISSION TO NOT LOOK AT ANYTHING EVER, AND RUN INTO THE FORUMS SCREAMING.

Wow, didn't know ACTA now meant prick aswell...

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