Steeled Posted June 28, 2012 Share Posted June 28, 2012 I recently tried starting a Tekkit Server, I watched tutorials and guides and such and have hosted many servers in the past. I get this strange error when trying to launch the tekkit server, something about nether ores? I'll post it: C:\Users\Sean\Desktop\Tekkit Server>java -Xmx3G -Xms2G -jar Tekkit.jar nogui 182 recipes 27 achievements 17:15:21 [iNFO] Starting minecraft server version 1.2.5 17:15:21 [iNFO] Forge Mod Loader version @MAJOR@.@MINOR@.@REV@.@BUILD@ for Minec raft @MCVERSION@ loading 17:15:21 [iNFO] Loading mods from C:\Users\Sean\Desktop\Tekkit Server\mods 17:15:21 [sEVERE] java.lang.UnsupportedClassVersionError: net/minecraft/server/m od_NetherOres : Unsupported major.minor version 51.0 17:15:21 [sEVERE] at java.lang.ClassLoader.defineClass1(Native Method) 17:15:21 [sEVERE] at java.lang.ClassLoader.defineClassCond(Unknown Source) 17:15:21 [sEVERE] at java.lang.ClassLoader.defineClass(Unknown Source) 17:15:21 [sEVERE] at java.security.SecureClassLoader.defineClass(Unknown S ource) 17:15:21 [sEVERE] at java.net.URLClassLoader.defineClass(Unknown Source) 17:15:21 [sEVERE] at java.net.URLClassLoader.access$000(Unknown Source) 17:15:21 [sEVERE] at java.net.URLClassLoader$1.run(Unknown Source) 17:15:21 [sEVERE] at java.security.AccessController.doPrivileged(Native Me thod) 17:15:21 [sEVERE] at java.net.URLClassLoader.findClass(Unknown Source) 17:15:21 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source) 17:15:21 [sEVERE] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown So urce) 17:15:21 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source) 17:15:21 [sEVERE] at java.lang.ClassLoader.loadClass(Unknown Source) 17:15:21 [sEVERE] at java.lang.Class.forName0(Native Method) 17:15:21 [sEVERE] at java.lang.Class.forName(Unknown Source) 17:15:21 [sEVERE] at cpw.mods.fml.common.Loader.loadModClass(Loader.java:4 40) 17:15:21 [sEVERE] at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.jav a:497) 17:15:21 [sEVERE] at cpw.mods.fml.common.Loader.load(Loader.java:375) 17:15:21 [sEVERE] at cpw.mods.fml.common.Loader.loadMods(Loader.java:527) 17:15:21 [sEVERE] at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBuk kitHandler.java:113) 17:15:21 [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftSe rver.java:118) 17:15:21 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:426) 17:15:21 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:492) 17:15:21 [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) > Well, there you go. If you have any idea whats wrong and if I can fix it, please let me know. Link to comment Share on other sites More sharing options...
Backplague Posted June 28, 2012 Share Posted June 28, 2012 Remove all versions of Java you may have and get Java 7, download link can be found at technicpack.net. Link to comment Share on other sites More sharing options...
Steeled Posted June 28, 2012 Author Share Posted June 28, 2012 Thanks, I'll try that now. Is changing enviromental variables a required thing? Link to comment Share on other sites More sharing options...
Steeled Posted June 28, 2012 Author Share Posted June 28, 2012 Ok I think I see where the problem was. I had 6 different versions of Java on my computer (I used to do a lot of Java stuff back in the day LOL) so I deleted them all, and installed the newest version of Java 7 x64. I looked at my enviromental variables, and the "PATH" one was set to a very old version of Java. I fixed the enviromental variables and now it worked. Let this be a lesson to all you others having issues out there. I'll lock this thread. Link to comment Share on other sites More sharing options...
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