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I'm using OptiForge in 1.6.2 with 6 extra mods installed and I got this error when I tried to open a Server or a Single Player world. I run Minecraft on a 2013 MacBook Air, and have never had any problems modding before... I have no idea what is going on, considering regular Forge works fine, and yes I am using .804 the recommended version (the one compatible with OptiForge). Please help!




---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 9/2/13 9:48 AM
Description: Unexpected error

java.lang.NoSuchFieldError: enabled
at net.minecraft.client.entity.AbstractClientPlayer.func_110302_j(AbstractClientPlayer.java:28)
at net.minecraft.client.entity.AbstractClientPlayer.<init>(AbstractClientPlayer.java:14)
at net.minecraft.client.entity.EntityPlayerSP.<init>(EntityPlayerSP.java:88)
at net.minecraft.client.entity.EntityClientPlayerMP.<init>(SourceFile:29)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78754_a(PlayerControllerMP.java:450)
at net.minecraft.client.Minecraft.func_71353_a(Minecraft.java:2131)
at net.minecraft.client.Minecraft.func_71403_a(Minecraft.java:2049)
at net.minecraft.client.multiplayer.NetClientHandler.func_72455_a(NetClientHandler.java:351)
at net.minecraft.network.packet.Packet1Login.func_73279_a(Packet1Login.java:119)
at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1953)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:898)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:826)
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)


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

-- Head --
Stacktrace:
at net.minecraft.client.entity.AbstractClientPlayer.func_110302_j(AbstractClientPlayer.java:28)
at net.minecraft.client.entity.AbstractClientPlayer.<init>(AbstractClientPlayer.java:14)
at net.minecraft.client.entity.EntityPlayerSP.<init>(EntityPlayerSP.java:88)
at net.minecraft.client.entity.EntityClientPlayerMP.<init>(SourceFile:29)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78754_a(PlayerControllerMP.java:450)
at net.minecraft.client.Minecraft.func_71353_a(Minecraft.java:2131)
at net.minecraft.client.Minecraft.func_71403_a(Minecraft.java:2049)
at net.minecraft.client.multiplayer.NetClientHandler.func_72455_a(NetClientHandler.java:351)
at net.minecraft.network.packet.Packet1Login.func_73279_a(Packet1Login.java:119)
at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)

-- Affected level --
Details:
Level name: MpServer
All players: 0 total; []
Chunk stats: MultiplayerChunkCache: 0
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (8,64,8), Chunk: (at 8,4,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 0 game time, 0 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 0 total; []
Retry entities: 0 total; []
Server brand: ~~ERROR~~ NullPointerException: null
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:440)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2298)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:851)
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)

-- System Details --
Details:
Minecraft Version: 1.6.2
Operating System: Mac OS X (x86_64) version 10.8.4
Java Version: 1.6.0_51, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 10881368 bytes (10 MB) / 129957888 bytes (123 MB) up to 129957888 bytes (123 MB)
JVM Flags: 0 total;
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: 3, tallocated: 63
FML: MCP v8.04 FML v6.2.35.804 Minecraft Forge 9.10.0.804 Optifine OptiFine_1.6.2_HD_U_B4 9 mods loaded, 9 mods active
mcp{8.04} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{6.2.35.804} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{9.10.0.804} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
shadersmod{2.0.1 beta 9} [GLSL Shaders Mod] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DamageIndicatorsMod{2.9.0.0} [Damage Indicators] (1.6.2 DamageIndicators v2.9.0.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AnimatedPlayer{1.2.1} [Animated Player Mod] (Animated Player v1.2.1 mc1.6.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_RadarBro{1.6.2} [mod_RadarBro] (RadarBro (1).zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ShowDurability2{1.2.6} [Show Durability II] (ShowDurability2_1.2.6_MC1.6.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_ReiMinimap{v3.4_01 [1.6.2]} [mod_ReiMinimap] ([1.6.2]ReiMinimap_v3.4_01.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Launched Version: OptiForge-1.6.2
LWJGL: 2.9.0
OpenGL: Intel HD Graphics 5000 OpenGL Engine GL version 2.1 INTEL-8.14.38, Intel Inc.
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Pack: faithful32pack
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

I've been having a similar problem and it seems that "Animated Player Mod" and "GLSL Shaders Mod" are conflicting. The only solution I came up with is to take one of them out. Just a reminder, I'm not an expert about modding minecraft so this might not solve your problem.