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Whenever i select a world it crashes and shows this (not every time but something like this), I've tried creating new worlds, deleting worlds and deleting the new mods i just downloaded but it doesn't work, it was working fine earlier. Can someone plz tell me why this is happening and how to fix it plz?

ps: here is the list of mods i use (forge 1.6.4)

Decocraft, Optifine standard D1, Rival Rebels, IChun Util (IChun mods: Gravity gun, Morph, Shatter, Portal Gun), CodeChickenCore (NEI), Orespawn, Animation API, Smart Moving, Mutant Creatures, Damage Indicators, ShadersModCore (SEUS Shaders), Dynamic Transport, Extended Renderer, Weather Mod, CoroUtil, Config Mod, SlimeVoid Library, Player API, More Nature, MCCapes, Superheroes Unlimited, Zan's Minimap, Animals Mod, autoutils, Statues, rei minimap, MB BattleGear 2, OceanCraft and DirtBike

---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 7/5/14 2:34 PM
Description: Unexpected error

java.lang.NullPointerException
at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a(NetClientHandler.java:956)
at net.minecraft.network.packet.Packet24MobSpawn.func_73279_a(SourceFile:87)
at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1967)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
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:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)


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

-- Head --
Stacktrace:
at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a(NetClientHandler.java:956)
at net.minecraft.network.packet.Packet24MobSpawn.func_73279_a(SourceFile:87)
at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP['oufan2004'/396, l='MpServer', x=10.50, y=65.62, z=-70.50]]
Chunk stats: MultiplayerChunkCache: 20
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (9,64,-67), Chunk: (at 9,4,13 in 0,-5; contains blocks 0,0,-80 to 15,255,-65), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 494 game time, 494 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: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 25 total; [EntityCreeper['Creeper'/139, l='MpServer', x=1.09, y=48.00, z=-50.31], EntityClientPlayerMP['oufan2004'/396, l='MpServer', x=10.50, y=65.62, z=-70.50], EntityCreeper['Creeper'/93, l='MpServer', x=-27.50, y=20.00, z=-54.50], EntityCreeper['Creeper'/92, l='MpServer', x=-29.88, y=20.00, z=-55.16], EntityCreeper['Creeper'/95, l='MpServer', x=-29.50, y=20.00, z=-60.50], EntityCreeper['Creeper'/94, l='MpServer', x=-30.69, y=20.00, z=-54.31], EntityItem['item.tile.gravel'/89, l='MpServer', x=-17.50, y=12.13, z=-74.94], EntityFallingSand['Falling Block'/239, l='MpServer', x=47.50, y=29.66, z=-66.50], EntityFallingSand['Falling Block'/238, l='MpServer', x=47.50, y=29.66, z=-68.50], EntitySquid['Squid'/170, l='MpServer', x=30.97, y=59.81, z=-59.47], EntityFallingSand['Falling Block'/237, l='MpServer', x=47.50, y=29.66, z=-67.50], EntitySquid['Squid'/169, l='MpServer', x=22.06, y=62.34, z=-49.78], EntitySkeleton['Skeleton'/167, l='MpServer', x=17.91, y=42.13, z=-80.31], EntityCreeper['Creeper'/166, l='MpServer', x=25.50, y=44.00, z=-94.50], EntityBat['Bat'/107, l='MpServer', x=-3.44, y=16.00, z=-88.13], EntityFallingSand['Falling Block'/248, l='MpServer', x=45.50, y=5.66, z=-38.50], EntitySquid['Squid'/249, l='MpServer', x=35.50, y=62.34, z=-43.91], EntityFallingSand['Falling Block'/246, l='MpServer', x=44.50, y=31.41, z=-55.50], EntitySquid['Squid'/247, l='MpServer', x=41.50, y=61.00, z=-53.41], EntityFallingSand['Falling Block'/244, l='MpServer', x=43.50, y=30.41, z=-54.50], EntityFallingSand['Falling Block'/245, l='MpServer', x=45.50, y=31.41, z=-56.50], EntityFallingSand['Falling Block'/242, l='MpServer', x=45.50, y=30.41, z=-54.50], EntityFallingSand['Falling Block'/243, l='MpServer', x=44.50, y=30.41, z=-54.50], EntityFallingSand['Falling Block'/240, l='MpServer', x=46.50, y=30.66, z=-67.50], EntityFallingSand['Falling Block'/241, l='MpServer', x=45.50, y=30.41, z=-55.50]]
Retry entities: 0 total; []
Server brand: fml,forge
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:2312)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:863)
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:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

-- System Details --
Details:
Minecraft Version: 1.6.4
Operating System: Mac OS X (x86_64) version 10.9.3
Java Version: 1.6.0_65, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 576209600 bytes (549 MB) / 1031090176 bytes (983 MB) up to 1065025536 bytes (1015 MB)
JVM Flags: 1 total; -Xmx1G
AABB Pool Size: 1 (56 bytes; 0 MB) allocated, 1 (56 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 2, tcache: 0, allocated: 1, tallocated: 63
FML: MCP v8.11 FML v6.4.49.965 Minecraft Forge 9.11.1.965 Optifine OptiFine_1.6.4_HD_D1 36 mods loaded, 36 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{6.4.49.965} [Forge Mod Loader] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{9.11.1.965} [Minecraft Forge] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CodeChickenCore{0.9.0.9} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
NotEnoughItems{1.6.1.9} [Not Enough Items] (NotEnoughItems 1.6.1.9.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
PlayerAPI{1.2} [Player API] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DamageIndicatorsMod{2.9.2.4} [Damage Indicators] (1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
battlegear2{1.0.4.8} [Mine & Blade Battlegear 2 - Bullseye] (1.6.4-MB_Battlegear2-Bullseye-1.0.4.8.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_animals{Not available} [mod_animals] (Animals mod planetcraft (9)) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AnimationAPI{1.1.1} [AnimationAPI] (AnimationAPI v1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Autoutils{1.0.1} [Autoutils] (autoutils-1.6.4-1.0.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ConfigMod{v1.0} [Extended Mod Config] (ConfigMod for MC v1.6.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CoroAI{v1.0} [CoroAI] (CoroUtil for MC v1.6.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
props{1.9a} [DecoCraft] (DecoCraft1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Dirtbike{v1.1.1} [Dirtbike Mod] (Dirtbike Mod - v1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
SlimevoidLib{2.1.0.0} [Slimevoid Library] (SlimevoidLib-1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicTransport{0.1.0.2} [Dynamic Transport] (DynamicTransport-1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ExtendedRenderer{v1.0} [Extended Renderer] (ExtendedRenderer for MC v1.6.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
iChunUtil{2.4.0} [iChunUtil] (util^iChunUtil2) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
GraviGun{2.0.0} [GraviGun] (files^GravityGun2) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MCCapesExtra{1.6.4a} [MCCapes Extra] (MCCapesExtra_1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MoreNature{0.5.6} [More Nature] (More Nature) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Morph{0.7.1} [Morph] (Morph-Beta-0) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MutantCreatures{1.4.4} [Mutant Creatures] (Mutant_Creatures_v1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Oceancraft{1.2.1} [Oceancraft Mod] (Oceancraft v1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
OreSpawn{164.17} [OreSpawn] (orespawn164v17) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
PortalGun{2.0.2} [PortalGun] (PortalGun2) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
RodolRivalRebels{1.6.4} [Rival Rebels] (RivalRebels) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Shatter{2.0.2} [Shatter] (Shatter2) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_SmartMoving{14.6} [Smart Moving] (Smart Moving Universal for ModLoader or Minecraft Forge or MCPC+.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_SmartRender{1.1} [Smart Render] (Smart Moving Universal for ModLoader or Minecraft Forge or MCPC+.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Statues{2.1.1} [Statues] (statues-1.6.4-2.1.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_Unlimited{2.3} [mod_Unlimited] (Superheroes Unlimited V3) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AIBlock{v1.0} [AIBlock] (Weather v1.591 Mod for MC v1.6.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
WeatherMod{1.591} [Weather and Tornadoes] (Weather v1.591 Mod for MC v1.6.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_ZanMinimap{0.9.4} [Zan's Minimap] (ZansMinimap1) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Launched Version: 1.6.4-Forge9.11.1.965
LWJGL: 2.9.0
OpenGL: ATI Radeon HD 5670 OpenGL Engine GL version 2.1 ATI-1.22.25, ATI Technologies Inc.
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Pack: Sphax PureBDcraft 128x MC16
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 created a new world and it works but when i move it crashes again