Problem Setting up a Tekkit Server

[Cheerful_Toe]

My normal Bukkit server works fine, but when I try to launch a Tekkit server, I get this error:

C:\Users\Family\Desktop\Tekkit Server>java -Xmx1G -Xms512M -jar Tekkit.jar nogui

 

182 recipes

27 achievements

12:50:41 [iNFO] Starting minecraft server version 1.2.5

12:50:41 [iNFO] Attempting early MinecraftForge initialization

12:50:41 [iNFO] Completed early MinecraftForge initialization

12:50:41 [iNFO] Forge Mod Loader version 2.2.91.173 for Minecraft 1.2.5 loading

12:50:41 [iNFO] Loading mods from C:\Users\Family\Desktop\Tekkit Server\mods

12:50:42 [WARNING] Failed to load mod class net/minecraft/server/mod_NetherOres.

class in C:\Users\Family\Desktop\Tekkit Server\mods\mod_NetherOres.jar

12:50:42 [sEVERE] Zip file mod_NetherOres.jar failed to read properly

12:50:42 [iNFO] File mod_NetherOres.jar contained no mods

12:50:42 [iNFO] Directory weaponmod contained no mods

12:50:42 [sEVERE] A problem has occured during mod loading. Likely a corrupt jar

is located in your mods directory

12:50:42 [sEVERE] cpw.mods.fml.common.LoaderException: cpw.mods.fml.common.Loade

rException: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_Net

herOres : Unsupported major.minor version 51.0

12:50:42 [sEVERE]      at cpw.mods.fml.common.Loader.load(Loader.java:436)

12:50:42 [sEVERE]      at cpw.mods.fml.common.Loader.loadMods(Loader.java:606)

12:50:42 [sEVERE]      at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBuk

kitHandler.java:134)

12:50:42 [sEVERE]      at net.minecraft.server.MinecraftServer.init(MinecraftSe

rver.java:135)

12:50:42 [sEVERE]      at net.minecraft.server.MinecraftServer.run(MinecraftSer

ver.java:438)

12:50:42 [sEVERE]      at net.minecraft.server.ThreadServerApplication.run(Sour

ceFile:492)

12:50:42 [sEVERE] Caused by: cpw.mods.fml.common.LoaderException: java.lang.Unsu

pportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsupported majo

r.minor version 51.0

12:50:42 [sEVERE]      at cpw.mods.fml.common.Loader.loadModClass(Loader.java:5

27)

12:50:42 [sEVERE]      at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.jav

a:562)

12:50:42 [sEVERE]      at cpw.mods.fml.common.Loader.load(Loader.java:419)

12:50:42 [sEVERE]      ... 5 more

12:50:42 [sEVERE] Caused by: java.lang.UnsupportedClassVersionError: net/minecra

ft/server/mod_NetherOres : Unsupported major.minor version 51.0

12:50:42 [sEVERE]      at java.lang.ClassLoader.defineClass1(Native Method)

12:50:42 [sEVERE]      at java.lang.ClassLoader.defineClassCond(Unknown Source)

 

12:50:42 [sEVERE]      at java.lang.ClassLoader.defineClass(Unknown Source)

12:50:42 [sEVERE]      at java.security.SecureClassLoader.defineClass(Unknown S

ource)

12:50:42 [sEVERE]      at java.net.URLClassLoader.defineClass(Unknown Source)

12:50:42 [sEVERE]      at java.net.URLClassLoader.access$000(Unknown Source)

12:50:42 [sEVERE]      at java.net.URLClassLoader$1.run(Unknown Source)

12:50:42 [sEVERE]      at java.security.AccessController.doPrivileged(Native Me

thod)

12:50:42 [sEVERE]      at java.net.URLClassLoader.findClass(Unknown Source)

12:50:42 [sEVERE]      at java.lang.ClassLoader.loadClass(Unknown Source)

12:50:42 [sEVERE]      at sun.misc.Launcher$AppClassLoader.loadClass(Unknown So

urce)

12:50:42 [sEVERE]      at java.lang.ClassLoader.loadClass(Unknown Source)

12:50:42 [sEVERE]      at java.lang.ClassLoader.loadClass(Unknown Source)

12:50:42 [sEVERE]      at java.lang.Class.forName0(Native Method)

12:50:42 [sEVERE]      at java.lang.Class.forName(Unknown Source)

12:50:42 [sEVERE]      at cpw.mods.fml.common.Loader.loadModClass(Loader.java:4

94)

12:50:42 [sEVERE]      ... 7 more

12:50:42 [sEVERE] Unexpected exception

cpw.mods.fml.common.LoaderException: cpw.mods.fml.common.LoaderException: java.l

ang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Unsuppor

ted major.minor version 51.0

        at cpw.mods.fml.common.Loader.load(Loader.java:436)

        at cpw.mods.fml.common.Loader.loadMods(Loader.java:606)

        at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:

134)

        at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:135)

        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)

        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

Caused by: cpw.mods.fml.common.LoaderException: java.lang.UnsupportedClassVersio

nError: net/minecraft/server/mod_NetherOres : Unsupported major.minor version 51

.0

        at cpw.mods.fml.common.Loader.loadModClass(Loader.java:527)

        at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:562)

        at cpw.mods.fml.common.Loader.load(Loader.java:419)

        ... 5 more

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

erOres : 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 java.lang.ClassLoader.loadClass(Unknown Source)

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

        at java.lang.Class.forName(Unknown Source)

        at cpw.mods.fml.common.Loader.loadModClass(Loader.java:494)

        ... 7 more

>

[Hunt of Doom]

Uninstall all of Java 6; intall Java 7.

Alternatively drag nether ores out of the pack and run.

[Cheerful_Toe]

I have Java 7.

[Hunt of Doom]

If you don't uninstall all of java 6 it doesn't matter if you have java 7. Check to make sure you don't have them both, because that's usually where this error arises from.

[Cheerful_Toe]

I have JDK and JRE7. Is that causing the problem?

[Cheerful_Toe]

I just deleted my Java and reinstalled it. Same error.

[prenetic]

Have you tried starting the server without NetherOres to see how far you get? It looks as if the .jar itself may be corrupted; try moving it to your desktop temporarily and start it up again.

12:50:42 [WARNING] Failed to load mod class net/minecraft/server/mod_NetherOres.

class in C:\Users\Family\Desktop\Tekkit Server\mods\mod_NetherOres.jar

12:50:42 [sEVERE] Zip file mod_NetherOres.jar failed to read properly

12:50:42 [iNFO] File mod_NetherOres.jar contained no mods

 

12:50:42 [sEVERE] A problem has occured during mod loading. Likely a corrupt jar

is located in your mods directory

[Terack]

Have you tried starting the server without NetherOres to see how far you get? It looks as if the .jar itself may be corrupted; try moving it to your desktop temporarily and start it up again.

12:50:42 [WARNING] Failed to load mod class net/minecraft/server/mod_NetherOres.

class in C:\Users\Family\Desktop\Tekkit Server\mods\mod_NetherOres.jar

12:50:42 [sEVERE] Zip file mod_NetherOres.jar failed to read properly

12:50:42 [iNFO] File mod_NetherOres.jar contained no mods

 

12:50:42 [sEVERE] A problem has occured during mod loading. Likely a corrupt jar

is located in your mods directory

That sorted it for me and now it works fine