TheBoo99 Posted March 20, 2012 Share Posted March 20, 2012 When I start my server, I get this error: >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) 19:00:04 [ALLVARLIG] 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 19:00:04 [ALLVARLIG] 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 19:00:04 [ALLVARLIG] 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) ... 6 more > Thats all! Hope that someone knows how to fix it! Link to comment Share on other sites More sharing options...
soulgriever Posted March 23, 2012 Share Posted March 23, 2012 code tags dude and you want to be more descriptive in your titles Link to comment Share on other sites More sharing options...
Taranis Posted March 24, 2012 Share Posted March 24, 2012 IC2 Advanced Machines need Java 1.7. I guess you have 1.6 installed. Link to comment Share on other sites More sharing options...
chloefirefox Posted March 24, 2012 Share Posted March 24, 2012 Make sure you don't have duplicate mods installed too. Check out this to see if it helps~ http://forums.technicpack.net/index.php/topic,5114.0.html ~Chloe Link to comment Share on other sites More sharing options...
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