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my mod pack crashes when someone besides the host in a lan world opens something. heres the crash report:

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 3/20/15 3:52 PM
Description: Rendering screen

java.lang.NullPointerException: Rendering screen
at codechicken.nei.LayoutManager.renderSlotOverlay(LayoutManager.java:719)
at codechicken.nei.guihook.GuiContainerManager.renderSlotOverlay(GuiContainerManager.java:444)
at net.minecraft.client.gui.inventory.GuiContainer.func_146977_a(GuiContainer.java:270)
at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:99)
at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1061)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:989)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:887)
at net.minecraft.client.main.Main.main(SourceFile:148)
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 --
Stacktrace:
at codechicken.nei.LayoutManager.renderSlotOverlay(LayoutManager.java:719)
at codechicken.nei.guihook.GuiContainerManager.renderSlotOverlay(GuiContainerManager.java:444)
at net.minecraft.client.gui.inventory.GuiContainer.func_146977_a(GuiContainer.java:270)
at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:99)

-- Screen render details --
Details:
Screen name: net.minecraft.client.gui.inventory.GuiCrafting
Mouse location: Scaled: (213, 119). Absolute: (427, 240)
Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
Level name: MpServer
All players: 2 total; [EntityClientPlayerMP['CrookClanner2'/106151, l='MpServer', x=53.39, y=60.62, z=15.30], EntityOtherPlayerMP['crooktechw'/295, l='MpServer', x=47.22, y=59.00, z=17.44]]
Chunk stats: MultiplayerChunkCache: 289, 289
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (0,64,0), Chunk: (at 0,4,0 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: 64371 game time, 83945 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: 6 total; [EntityBat['Bat'/96641, l='MpServer', x=59.91, y=53.10, z=9.44], EntityClientPlayerMP['CrookClanner2'/106151, l='MpServer', x=53.39, y=60.62, z=15.30], EntityBat['Bat'/105877, l='MpServer', x=121.25, y=18.10, z=2.28], EntityOtherPlayerMP['crooktechw'/295, l='MpServer', x=47.22, y=59.00, z=17.44], EntityOtherPlayerMP['crooktechw'/295, l='MpServer', x=47.22, y=59.00, z=17.44], EntityBat['Bat'/105663, l='MpServer', x=35.17, y=14.49, z=69.72]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:373)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2432)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:909)
at net.minecraft.client.main.Main.main(SourceFile:148)
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: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 202164496 bytes (192 MB) / 601964544 bytes (574 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.85.1291 Minecraft Forge 10.13.2.1291 31 mods loaded, 31 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
FML{7.10.85.1291} [Forge Mod Loader] (forge-1.7.10-10.13.2.1291.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Forge{10.13.2.1291} [Minecraft Forge] (forge-1.7.10-10.13.2.1291.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
appliedenergistics2-core{rv1-stable-1} [AppliedEnergistics2 Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
CodeChickenCore{1.0.1.8} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
NotEnoughItems{1.0.2.15} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.2.15-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod.ymt.air.HariboteAirCraft{172v3 hiten} [HariboteAirCraft] (aircraft mod) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
appliedenergistics2{rv1-stable-1} [Applied Energistics 2] (appliedenergistics2-rv1-stable-1 (1).jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Core{6.4.3} [BuildCraft] (buildcraft-6.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Transport{6.4.3} [BC Transport] (buildcraft-6.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Silicon{6.4.3} [BC Silicon] (buildcraft-6.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Builders{6.4.3} [BC Builders] (buildcraft-6.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Energy{6.4.3} [BC Energy] (buildcraft-6.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Factory{6.4.3} [BC Factory] (buildcraft-6.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
flansmod{4.9.0} [Flan's Mod] (Flans Mod-1.7.10-4.9.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ForgeMultipart{1.1.1.320} [Forge Multipart] (ForgeMultipart-1.7.10-1.1.1.320-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Mekanism{7.1.2} [Mekanism] (Mekanism-1.7.10-7.1.2.185.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
MekanismGenerators{7.1.2} [MekanismGenerators] (MekanismGenerators-1.7.10-7.1.2.185.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
MekanismTools{7.1.2} [MekanismTools] (MekanismTools-1.7.10-7.1.2.185.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
cfm{3.4.7} [§9MrCrayfish's Furniture Mod] (MrCrayfishFurnitureModv3.4.7(1.7.10).jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Core{4.4.5.44} [ProjectRed] (ProjectRed-Base-1.7.10-4.4.5.44.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Transmission{4.4.5.44} [ProjectRed-Transmission] (ProjectRed-Integration-1.7.10-4.4.5.44.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Transportation{4.4.5.44} [ProjectRed-Transportation] (ProjectRed-Mechanical-1.7.10-4.4.5.44.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Exploration{4.4.5.44} [ProjectRed-Exploration] (ProjectRed-World-1.7.10-4.4.5.44.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Compatibility{4.4.5.44} [ProjectRed-Compatibility] (ProjectRed-Compat-1.7.10-4.4.5.44.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Integration{4.4.5.44} [ProjectRed-Integration] (ProjectRed-Integration-1.7.10-4.4.5.44.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Illumination{4.4.5.44} [ProjectRed-Illumination] (ProjectRed-Lighting-1.7.10-4.4.5.44.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Expansion{4.4.5.44} [ProjectRed-Expansion] (ProjectRed-Mechanical-1.7.10-4.4.5.44.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ReiMinimap{1.7.10} [Rei's Minimap] (Reis-Minimap-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
McMultipart{1.1.1.320} [Minecraft Multipart Plugin] (ForgeMultipart-1.7.10-1.1.1.320-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ForgeMicroblock{1.1.1.320} [Forge Microblocks] (ForgeMultipart-1.7.10-1.1.1.320-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
AE2 Version: stable rv1-stable-1 for Forge 10.13.0.1187
AE2 Integration: IC2:OFF, RotaryCraft:OFF, RC:OFF, BC:ON, MJ6:OFF, MJ5:OFF, RF:ON, RFItem:ON, MFR:OFF, DSU:OFF, FZ:OFF, FMP:ON, RB:OFF, CLApi:OFF, Waila:OFF, InvTweaks:OFF, NEI:ON, CraftGuide:OFF, Mekanism:ON, ImmibisMicroblocks:OFF, BetterStorage:OFF
Launched Version: 1.7.10-Forge10.13.2.1291
LWJGL: 2.9.1
OpenGL: GeForce GTX 650 Ti/PCIe/SSE2 GL version 4.3.0, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

Thanks i'm trying it without NEI ill say if it works.

Thanks, it worked. I'm going to try too many items now. Ill see if that works.