[CRASH BUG] Bat-pack crashing when equipped

    equipped a Bat-pack to the chest on a multiplayer server and crashed and every time I've tried to log in it crashes right away.

    Mods loaded: 10
    ModLoader 1.1
    mod_Planes 1.1v16
    mod_MinecraftForge 1.3.3.14
    mod_ModLoaderMp 1.1v3
    mod_BuildCraftCore 2.2.12
    mod_BuildCraftBuilders 2.2.12
    mod_BuildCraftEnergy 2.2.12
    mod_BuildCraftFactory 2.2.12
    mod_BuildCraftTransport 2.2.12
    mod_IC2 v1.64

    Minecraft has crashed!
    ----------------------

    Minecraft has stopped running because it encountered a problem.

    If you wish to report this, please copy this entire text and email it to support@mojang.com.
    Please include a description of what you did when the error occured.


    --- BEGIN ERROR REPORT d356b1ac --------
    Generated 2/19/12 5:25 PM

    Minecraft: Minecraft 1.1
    OS: Windows 7 (amd64) version 6.1
    Java: 1.6.0_25, Sun Microsystems Inc.
    VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
    LWJGL: 2.4.2
    OpenGL: GeForce GTX 460/PCI/SSE2 version 4.2.0, NVIDIA Corporation

    java.lang.AbstractMethodError: ic2.common.ItemArmorBatpack.getArmorDisplay(Lxb;Lyq;I)I
    at agq.a(GuiIngame.java:116)
    at kz.b(EntityRenderer.java:945)
    at EntityRendererProxy.b(EntityRendererProxy.java:15)
    at net.minecraft.client.Minecraft.x(SourceFile:742)
    at net.minecraft.client.Minecraft.run(SourceFile:662)
    at java.lang.Thread.run(Unknown Source)
    --- END ERROR REPORT 91e6d0e3 ----------

    Joined a normal server with nods on it and it works fine but the server i play on crashes every time i logged in cause of the batpack
    version 1.6.4

    I have had the same problem whilst using the batpack, except I have mac osx 10, and only have industrial craft (including Modloader, ModloaderMP, audio mod and MC forge) installed. Any help would be appreciated.

    I tried to fix this by using 1.70b and now I get this crash:

    Display Spoiler

    Mods loaded: 31
    ModLoader 1.1
    mod_ModLoaderMp 1.1
    mod_MinecraftForge 1.3.3.12
    mod_BuildCraftCore 2.2.12
    mod_BuildCraftBuilders 2.2.12
    mod_BuildCraftEnergy 2.2.12
    mod_BuildCraftFactory 2.2.12
    mod_BuildCraftTransport 2.2.12
    mod_CraftGuide 1.4.2 for Minecraft 1.1.0
    mod_Forestry 1.2.6.5
    mod_IC2 v1.70
    mod_PigbearLaser Laser 1.1
    mod_LightSensor 1.1
    mod_IC2_ChargingBench 1.64-1
    mod_IronChest 2.5
    mod_QuickGuide 1.1
    mod_RailcraftAutomation 3.3.1
    mod_RailcraftBuildcraft 3.3.1
    mod_RailcraftCore 3.3.1
    mod_RailcraftExtras 3.3.1
    mod_RailcraftFactory 3.3.1
    mod_RailcraftIC2 3.3.1
    mod_RailcraftInfrastructure 3.3.1
    mod_RailcraftRails 3.3.1
    mod_RedPowerArray 2.0pr4d
    mod_RedPowerCore 2.0pr4d
    mod_RedPowerLighting 2.0pr4d
    mod_RedPowerLogic 2.0pr4d
    mod_RedPowerMachine 2.0pr4d
    mod_RedPowerWiring 2.0pr4d
    mod_RedPowerWorld 2.0pr4d

    Minecraft has crashed!
    ----------------------

    Minecraft has stopped running because it encountered a problem.

    If you wish to report this, please copy this entire text and email it to support@mojang.com.
    Please include a description of what you did when the error occured.


    --- BEGIN ERROR REPORT b0868179 --------
    Generated 2/22/12 3:46 PM

    Minecraft: Minecraft 1.1
    OS: Windows 7 (amd64) version 6.1
    Java: 1.6.0_29, Sun Microsystems Inc.
    VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
    LWJGL: 2.8.3
    OpenGL: GeForce GT 435M/PCI/SSE2 version 4.1.0, NVIDIA Corporation

    java.lang.NoClassDefFoundError: ic2/common/IHasGuiContainer
    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 java.lang.ClassLoader.loadClass(Unknown Source)
    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 java.lang.ClassLoader.loadClass(Unknown Source)
    at mod_IC2_ChargingBench.load(mod_IC2_ChargingBench.java:38)
    at ModLoader.init(ModLoader.java:824)
    at ModLoader.AddAllRenderers(ModLoader.java:189)
    at afq.<init>(afq.java:80)
    at afq.<clinit>(afq.java:9)
    at net.minecraft.client.Minecraft.a(SourceFile:265)
    at net.minecraft.client.Minecraft.run(SourceFile:648)
    at java.lang.Thread.run(Unknown Source)
    Caused by: java.lang.ClassNotFoundException: ic2.common.IHasGuiContainer
    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 java.lang.ClassLoader.loadClass(Unknown Source)
    ... 30 more
    --- END ERROR REPORT 4183c4af ----------


    I have the latest forge (1.3.3.12)

    Quote from RichardG

    Use v1.70b or downgrade Forge to 1.3.2.4.

    Also when I try to use Forge 1.3.2.4 I get this crash error:

    Display Spoiler

    Mods loaded: 31
    ModLoader 1.1
    mod_ModLoaderMp 1.1
    mod_MinecraftForge 1.3.2.4
    mod_BuildCraftCore 2.2.12
    mod_BuildCraftBuilders 2.2.12
    mod_BuildCraftEnergy 2.2.12
    mod_BuildCraftFactory 2.2.12
    mod_BuildCraftTransport 2.2.12
    mod_CraftGuide 1.4.2 for Minecraft 1.1.0
    mod_Forestry 1.2.6.5
    mod_IC2 v1.64
    mod_PigbearLaser Laser 1.1
    mod_LightSensor 1.1
    mod_IC2_ChargingBench 1.64-1
    mod_IronChest 2.5
    mod_QuickGuide 1.1
    mod_RailcraftAutomation 3.3.1
    mod_RailcraftBuildcraft 3.3.1
    mod_RailcraftCore 3.3.1
    mod_RailcraftExtras 3.3.1
    mod_RailcraftFactory 3.3.1
    mod_RailcraftIC2 3.3.1
    mod_RailcraftInfrastructure 3.3.1
    mod_RailcraftRails 3.3.1
    mod_RedPowerArray 2.0pr4d
    mod_RedPowerCore 2.0pr4d
    mod_RedPowerLighting 2.0pr4d
    mod_RedPowerLogic 2.0pr4d
    mod_RedPowerMachine 2.0pr4d
    mod_RedPowerWiring 2.0pr4d
    mod_RedPowerWorld 2.0pr4d

    Minecraft has crashed!
    ----------------------

    Minecraft has stopped running because it encountered a problem.

    If you wish to report this, please copy this entire text and email it to support@mojang.com.
    Please include a description of what you did when the error occured.


    --- BEGIN ERROR REPORT 88390194 --------
    Generated 2/22/12 3:58 PM

    Minecraft: Minecraft 1.1
    OS: Windows 7 (amd64) version 6.1
    Java: 1.6.0_29, Sun Microsystems Inc.
    VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
    LWJGL: 2.8.3
    OpenGL: GeForce GT 435M/PCI/SSE2 version 4.1.0, NVIDIA Corporation

    java.lang.RuntimeException: IronChest: MinecraftForge Too Old, need at least 1.3.3
    at forge.MinecraftForge.killMinecraft(MinecraftForge.java:357)
    at forge.MinecraftForge.versionDetect(MinecraftForge.java:377)
    at mod_IronChest.load(mod_IronChest.java:31)
    at ModLoader.init(ModLoader.java:824)
    at ModLoader.AddAllRenderers(ModLoader.java:189)
    at afq.<init>(afq.java:80)
    at afq.<clinit>(afq.java:9)
    at net.minecraft.client.Minecraft.a(SourceFile:265)
    at net.minecraft.client.Minecraft.run(SourceFile:648)
    at java.lang.Thread.run(Unknown Source)
    --- END ERROR REPORT d05c8325 ----------

    I removed the Ironchest mod, and still got a Saving Chunks crash when I opened the world. Do I have to erase my player's inventory without opening minecraft or something?

    Any help would be great, this is super frustrating to suddenly happen =/