Help: Setting up a server

[VMAN4567]

I'm trying to set up a server and I'm having an issue. I've set up a normal Minecraft server so all connection issues are fine. I just can't seem launch a Tekkit server. I've followed the tutorial on this page exactly: http://forums.technicpack.net/threads/how-to-set-up-a-tekkit-server-step-by-step-guide-win-7-images.2299/

However, whenever, I try to launch it, I still get what I assume to be a Java error:

C:\Users\Vishal\Downloads\Tekkit_Server_3.0.4>java -Xmx3G -Xms2G -jar Tekkit.jar

nogui

182 recipes

27 achievements

22:43:16 [iNFO] Starting minecraft server version 1.2.5

22:43:17 [iNFO] Forge Mod Loader version @MAJOR@.@MINOR@.@REV@.@BUILD@ for Minec

raft @MCVERSION@ loading

22:43:17 [iNFO] Loading mods from C:\Users\Vishal\Downloads\Tekkit_Server_3.0.4\

mods

22:43:17 [sEVERE] java.lang.UnsupportedClassVersionError: net/minecraft/server/m

od_NetherOres : Unsupported major.minor version 51.0

22:43:17 [sEVERE] at java.lang.ClassLoader.defineClass1(Native Method)

22:43:17 [sEVERE] at java.lang.ClassLoader.defineClassCond(Unknown Source)

22:43:17 [sEVERE] at java.lang.ClassLoader.defineClass(Unknown Source)

22:43:17 [sEVERE] at java.security.SecureClassLoader.defineClass(Unknown S

ource)

22:43:17 [sEVERE] at java.net.URLClassLoader.defineClass(Unknown Source)

22:43:17 [sEVERE] at java.net.URLClassLoader.access$000(Unknown Source)

22:43:17 [sEVERE] at java.net.URLClassLoader$1.run(Unknown Source)

22:43:17 [sEVERE] at java.security.AccessController.doPrivileged(Native Me

thod)

22:43:17 [sEVERE] at java.net.URLClassLoader.findClass(Unknown Source)

22:43:17 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source)

22:43:17 [sEVERE] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown So

urce)

22:43:17 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source)

22:43:17 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source)

22:43:17 [sEVERE] at java.lang.Class.forName0(Native Method)

22:43:17 [sEVERE] at java.lang.Class.forName(Unknown Source)

22:43:17 [sEVERE] at cpw.mods.fml.common.Loader.loadModClass(Loader.java:4

40)

22:43:17 [sEVERE] at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.jav

a:497)

22:43:17 [sEVERE] at cpw.mods.fml.common.Loader.load(Loader.java:375)

22:43:17 [sEVERE] at cpw.mods.fml.common.Loader.loadMods(Loader.java:527)

22:43:17 [sEVERE] at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBuk

kitHandler.java:113)

22:43:17 [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftSe

rver.java:118)

22:43:17 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer

ver.java:426)

22:43:17 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour

ceFile:492)

22:43:17 [sEVERE] Unexpected exception

java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_NetherOres : Un

supported 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:440)

at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:497)

at cpw.mods.fml.common.Loader.load(Loader.java:375)

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

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

113)

at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:118)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)

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

If anyone could recognize what is going on and help solve the problem, It would be much appreciated.

[electronerd]

Your Java is out of date.

[Mufasah87]

I Re-installed and updated my Java and I am still having the same problem. Any suggestions?

[electronerd]

what does "java -version" (without quotes) return?

[Mufasah87]

what does "java -version" (without quotes) return?

After putting it into the cmd prompt or by googling it?

[electronerd]

command prompt

[Mufasah87]

command prompt

>java-version

01:50:03 [iNFO] Stopping server

01:50:03 [sEVERE] java.lang.IndexOutOfBoundsException: Index: 0, Size: 0

01:50:03 [sEVERE] at java.util.ArrayList.RangeCheck(Unknown Source)

01:50:03 [sEVERE] at java.util.ArrayList.get(Unknown Source)

01:50:03 [sEVERE] at net.minecraft.server.MinecraftServer.stop(MinecraftSe

rver.java:412)

01:50:03 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer

ver.java:483)

01:50:03 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour

ceFile:492)

01:50:03 [iNFO] Stopping server

>

[electronerd]

I meant at the system command prompt, not the server command prompt. Also, there's a space between the word java and the dash.

My next advice is likely to be the same anyway: You probably actually have multiple Java versions installed. Uninstall *all* versions of Java on your computer, then install the latest version, which is version 7 update 5 or 1.7 update 5 (same thing)

[Mufasah87]

C:\Users\Mufasa>java -version

java version "1.6.0_16"

Java SE Runtime Environment (build 1.6.0_16-b01)

Java HotSpot 64-Bit Server VM (build 14.2-b01, mixed mode)

How do I know if i have uninstalled every version?

[Mufasah87]

It worked! thanks man, really appreciate it.

[electronerd]

Glad it worked for you

For future readers who stumble across this post:

How do I know if i have uninstalled every version?

Just keep uninstalling versions of Java until there aren't any versions left in the Programs and Features window to uninstall

[VMAN4567]

Alright, so I followed what you said and it worked like a charm. The server set up perfectly but now, The technic launcher isn't working because my java is the wrong version. Should I uninstall the java version I just installed and try to install a slightly older version or should I do something else?

[electronerd]

Download and install the 64-bit version from http://java.com/en/download/manual.jsp

Leave the 32-bit version installed.

[VMAN4567]

Alright! Finally got it to work. Thank you so much. If it weren't for you, I would probably still be tearing my hair out trying to figure it out. I hope this thread will help anyone else who has this problem.