Help please! i've just downloaded forge 1.11.2, did the install client then run the new profile and it just crashed. BTW i don't think i installed any 1.11.2 mods, i only got the 1.10.2 mods.

 

 

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// Uh... Did I do that?

Time: 6/30/17 5:15 PM
Description: Initializing game

java.lang.VerifyError: Bad return type
Exception Details:
  Location:
    Config.getDefiningResourcePack(Lnet/minecraft/network/datasync/EntityDataManager;)Lnet/minecraft/client/renderer/entity/layers/LayerDeadmau5Head; @48: areturn
  Reason:
    Type 'net/minecraft/client/renderer/entity/RenderWitherSkeleton' (current frame, stack[0]) is not assignable to 'net/minecraft/client/renderer/entity/layers/LayerDeadmau5Head' (from method signature)
  Current Frame:
    bci: @48
    flags: { }
    locals: { 'net/minecraft/network/datasync/EntityDataManager', '[Lnet/minecraft/client/renderer/entity/layers/LayerDeadmau5Head;' }
    stack: { 'net/minecraft/client/renderer/entity/RenderWitherSkeleton' }
  Bytecode:
    0x0000000: b803 484c 2bbe 0464 3d1c 9b00 192b 1c32
    0x0000010: 4e2d 2ab9 0372 0200 9900 052d b084 02ff
    0x0000020: a7ff e9b8 034c 2ab6 0373 9900 07b8 034c
    0x0000030: b001 b0                                
  Stackmap Table:
    append_frame(@9,Object[#827],Integer)
    same_frame(@29)
    chop_frame(@35,1)
    same_frame(@49)

    at java.lang.Class.getDeclaredFields0(Native Method)
    at java.lang.Class.privateGetDeclaredFields(Class.java:2575)
    at java.lang.Class.getField0(Class.java:2967)
    at java.lang.Class.getField(Class.java:1693)
    at net.minecraftforge.fml.client.FMLClientHandler.detectOptifine(FMLClientHandler.java:310)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:217)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:440)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:352)
    at net.minecraft.client.main.Main.main(SourceFile:124)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
    at java.lang.Class.getDeclaredFields0(Native Method)
    at java.lang.Class.privateGetDeclaredFields(Class.java:2575)
    at java.lang.Class.getField0(Class.java:2967)
    at java.lang.Class.getField(Class.java:1693)
    at net.minecraftforge.fml.client.FMLClientHandler.detectOptifine(FMLClientHandler.java:310)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:217)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:440)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:352)
    at net.minecraft.client.main.Main.main(SourceFile:124)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.11.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_25, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 78738472 bytes (75 MB) / 259158016 bytes (247 MB) up to 2134114304 bytes (2035 MB)
    JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML:
    Loaded coremods (and transformers):
    Launched Version: 1.11.2-forge1.11.2-13.20.1.2388
    LWJGL: 2.9.4
    OpenGL: Intel(R) HD Graphics 5500 GL version 4.4.0 - Build 20.19.15.4549, Intel
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs:
    Current Language: ~~ERROR~~ NullPointerException: null
    Profiler Position: N/A (disabled)
    CPU: 4x Intel(R) Core(TM) i3-5005U CPU @ 2.00GHz

Thank you for looking into this but i'm not sure about that. I only have optifine for version 1.10.2 not for 1.11.2 .

How does this affects different other minecraft version??

You should look at the mods you have for 1.11.2, not 1.10.2, as you're running 1.11.2 according to the log.

Sorry, i don't get it. So i can't have multiple versions of minecraft (profile) along with multiple versions of mods - all in one launcher.

I replaced all the mods to 1.11.2 and it works. Thank you VERY much !!