Help with Mekanism Loading - Java Edition Support - Support - Minecraft Forum

#1 May 14, 2015

Gunner_Bones

Tree Puncher
Join Date: 2/10/2015
Posts: 18
Minecraft: GunnerBones
Xbox: GunnerBones
PSN: N/A
Member Details

Hello all,

Many people are experiencing the same problem I have, and I've searched every forum and nobody has helped. This is my last chance.

I am trying to use the Mekanism mod for Minecraft 1.7.10 on Forge, modded client. Whenever I load the modded client with Mekanism, wether or not there are other mods installed, Minecraft crashes saying java.lang.UnsupportedClassVersionError: mekanism/common/asm/LoadingHook : Unsupported major.minor version 51.0. Everyone keeps saying to update Java, so I did, I'm on Java 8 now and still the same problem.

Since for some reason my launcher is not counting that as a crash, I can't find a crash report. The spoiler is the full report.

[19:20:53] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[19:20:53] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[19:20:53] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[19:20:53] [main/INFO] [FML]: Forge Mod Loader version 7.10.85.1286 for Minecraft 1.7.10 loading
[19:20:53] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.6.0_65, running on Mac OS X:x86_64:10.9.5, installed at /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:461]: java.lang.UnsupportedClassVersionError: mekanism/common/asm/LoadingHook : Unsupported major.minor version 51.0
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.defineClass1(Native Method)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.security.AccessController.doPrivileged(Native Method)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.Class.forName0(Native Method)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.Class.forName(Class.java:249)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:417)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:346)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:214)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[19:20:53] [main/ERROR] [FML]: An error occurred trying to configure the minecraft home at /Users/GunnerBones/Library/Application Support/minecraft for Forge Mod Loader
java.lang.UnsupportedClassVersionError: mekanism/common/asm/LoadingHook : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.6.0_65]
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) ~[?:1.6.0_65]
at java.lang.ClassLoader.defineClass(ClassLoader.java:621) ~[?:1.6.0_65]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) ~[?:1.6.0_65]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) ~[?:1.6.0_65]
at java.net.URLClassLoader.access$000(URLClassLoader.java:58) ~[?:1.6.0_65]
at java.net.URLClassLoader$1.run(URLClassLoader.java:197) ~[?:1.6.0_65]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.6.0_65]
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) ~[?:1.6.0_65]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:306) ~[?:1.6.0_65]
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ~[?:1.6.0_65]
at java.lang.Class.forName0(Native Method) ~[?:1.6.0_65]
at java.lang.Class.forName(Class.java:249) ~[?:1.6.0_65]
at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:417) ~[forge-1.7.10-10.13.2.1286.jar:?]
at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:346) ~[forge-1.7.10-10.13.2.1286.jar:?]
at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:214) ~[forge-1.7.10-10.13.2.1286.jar:?]
at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90) [forge-1.7.10-10.13.2.1286.jar:?]
at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67) [forge-1.7.10-10.13.2.1286.jar:?]
at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34) [forge-1.7.10-10.13.2.1286.jar:?]
at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126) [forge-1.7.10-10.13.2.1286.jar:?]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.11.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]
Exception in thread "main" [19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:461]: java.lang.UnsupportedClassVersionError: mekanism/common/asm/LoadingHook : Unsupported major.minor version 51.0
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.defineClass1(Native Method)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.security.AccessController.doPrivileged(Native Method)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.Class.forName0(Native Method)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at java.lang.Class.forName(Class.java:249)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:417)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:346)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:214)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[19:20:53] [main/INFO] [STDERR]: [java.lang.Throwable:printStackTrace:464]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

I re-downloaded all 3 Mekanism .jars 2 times and still the same. Can someone please help???

Thanks, Gunner

If anything you add via commands gets boring, that's what Lore is for!

/give @p iron_ingot 1 0 {display:{Lore:[Das shiny ingot!]}}

#3 May 18, 2015

Gunner_Bones

Tree Puncher
Join Date: 2/10/2015
Posts: 18
Minecraft: GunnerBones
Xbox: GunnerBones
PSN: N/A
Member Details

Quote from grimallq »

Java 7+ required.

I am using Java 7

If anything you add via commands gets boring, that's what Lore is for!

/give @p iron_ingot 1 0 {display:{Lore:[Das shiny ingot!]}}

#4 May 18, 2015

TheGreatGhoulHater

The Meaning of Life, the Universe, and Everything.
Join Date: 4/8/2015
Posts: 332
Member Details

Minecraft isn't though. You need to change the version of java that your minecraft is using.