My Tekkit server does this:

[Jonathan123ii]

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

2012-03-24 11:05:53 [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

2012-03-24 11:05:53 [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_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

Can anyone help me to get rid of this error? I cannot find java 1.7 to fix this problem. D: I can't put all the errors because it goes over the limit.

[bastrian]

Check this:

http://forums.technicpack.net/index.php/topic,2834.0.html

[Jonathan123ii]

Oh I read that already but I can't find the correct Java.

[Cheap Shot]

I appreciate that the problem is already spelled out, but can you add in the mandatory bug report info anyway? It's for standardization so we can catalog problems easier, and we've been probating people for not using it.