ClassNotFound exception when attempting to load Minecraft backpack

Gigi180
  • ClassNotFound exception when attempting to load Minecraft backpack Gigi180

    I am a total novice and posting for my child who downloaded a new mod and seemed to mess up her forge/backpack/mca. I think in trying to fix, I probably messed it up more. Here is the error report:

    Description: There was a severe problem during mod loading that has caused the game to fail
    
    cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: backpack.Backpack
        at cpw.mods.fml.common.ProxyInjector.inject(ProxyInjector.java:75)
        at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:519)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
        at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
        at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
        at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
        at com.google.common.eventbus.EventBus.post(EventBus.java:267)
        at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:194)
        at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:174)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
        at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
        at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
        at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
        at com.google.common.eventbus.EventBus.post(EventBus.java:267)
        at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:105)
        at cpw.mods.fml.common.Loader.loadMods(Loader.java:509)
        at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:181)
        at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:471)
        at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:806)
        at net.minecraft.client.main.Main.main(SourceFile:101)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at net.minecraft.launchwrapper.Launch.launch(Launch.java:57)
        at net.minecraft.launchwrapper.Launch.main(Launch.java:18)
    Caused by: java.lang.ClassNotFoundException: backpack.Backpack
        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:94)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
        at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:58)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:249)
        at cpw.mods.fml.common.ProxyInjector.inject(ProxyInjector.java:42)
        ... 33 more
    
    A detailed walkthrough of the error, its code path and all known details is as follows:
    ---------------------------------------------------------------------------------------
    -- System Details --
    Details:
        Minecraft Version: 1.6.2
        Operating System: Mac OS X (x86_64) version 10.7.5
        Java Version: 1.6.0_65, Apple Inc.
        Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
        Memory: 40509584 bytes (38 MB) / 117997568 bytes (112 MB) up to 1065025536 bytes (1015 MB)
        JVM Flags: 1 total; -Xmx1G
        AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
        Suspicious classes: FML and Forge are installed
        IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
        FML: MCP v8.04 FML v6.2.62.871 Minecraft Forge 9.10.1.871 9 mods loaded, 9 mods active
        mcp{8.04} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
        FML{6.2.62.871} [Forge Mod Loader] (minecraftforge-9.10.1.871.jar) Unloaded->Constructed
        Forge{9.10.1.871} [Minecraft Forge] (minecraftforge-9.10.1.871.jar) Unloaded->Constructed
        jammyfurniture{4.5} [Jammy Furniture Mod] (1.6.2_Jammy_Furniture_Mod_V4.5) Unloaded->Constructed
        betterbiomes{1.3.0 for MC 1.6.2} [Better Biomes] (Better Biomes 1.3.0 for MC 1.6.2) Unloaded->Constructed
        SKC-BetterWood{1.0.5.0} [Better Wood] (BetterWood 1.0.5.0 - MC 1.6.2 - Forge (9.10.0.789)) Unloaded->Constructed
        Backpack{1.12.15} [Backpack] (MCA v3.5.4-2) Unloaded->Errored
        mca{3.5.4} [Minecraft Comes Alive] (MCA v3.5.4-2) Unloaded->Errored
        mod_ReiMinimap{v3.4_01 [1.6.2]} [mod_ReiMinimap] ([1.6.2]ReiMinimap_v3.4_01) Unloaded->Constructed
    

    Obviously there is something wrong with MCA and backpack, but I have no idea how to fix this without taking everything off and starting over, which will make us lose data? Please help in layman's terms :)

    Thanks!

  • You could try to reinstall again all mods, that you are installing before this error. And you should read once more installation instruction, because it seems that some files are missing or locates in wrong directory. Because of this 'invoke' in error description, it seems for me that mod trying to find *.class file, but this file is missing.

Tags
minecraft minecraft-forge
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