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This is the crash report I get and I do not know what else to do. Any help would be apricated

---- Minecraft Crash Report ----
// On the bright side, I bought you a teddy bear!

Time: 4/27/13 1:01 PM
Description: Rendering screen

java.lang.NullPointerException
at ur.<init>(SourceFile:54)
at gregtechmod.common.GT_CreativeTab.getIconItemStack(GT_CreativeTab.java:17)
at avs.a(GuiContainerCreative.java:833)
at avs.a(GuiContainerCreative.java:660)
at avf.a(GuiContainer.java:106)
at avv.a(SourceFile:31)
at avs.a(GuiContainerCreative.java:591)
at ban.b(EntityRenderer.java:1004)
at net.minecraft.client.Minecraft.J(Minecraft.java:884)
at net.minecraft.client.Minecraft.run(Minecraft.java:773)
at java.lang.Thread.run(Unknown Source)


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

-- Head --
Stacktrace:
at ur.<init>(SourceFile:54)
at gregtechmod.common.GT_CreativeTab.getIconItemStack(GT_CreativeTab.java:17)
at avs.a(GuiContainerCreative.java:833)
at avs.a(GuiContainerCreative.java:660)
at avf.a(GuiContainer.java:106)
at avv.a(SourceFile:31)
at avs.a(GuiContainerCreative.java:591)

-- Screen render details --
Details:
Screen name: avs
Mouse location: Scaled: (307, 10). Absolute: (615, 481)
Screen size: Scaled: (442, 251). Absolute: (884, 502). Scale factor of 2

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [ays['Lanndid'/1175, l='MpServer', x=-702.53, y=95.71, z=1376.24]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (200,64,256), Chunk: (at 8,4,0 in 12,16; contains blocks 192,0,256 to 207,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 818828 game time, 840087 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: 92 total; [qr['Zombie'/1494, l='MpServer', x=-748.50, y=17.00, z=1441.50], qn['Skeleton'/1221, l='MpServer', x=-753.50, y=83.00, z=1415.16], qr['Zombie'/1220, l='MpServer', x=-654.50, y=26.00, z=1397.50], qc['Creeper'/1223, l='MpServer', x=-767.50, y=27.00, z=1329.50], pd['Pig'/1222, l='MpServer', x=-756.59, y=87.00, z=1428.73], ays['Lanndid'/1175, l='MpServer', x=-702.53, y=95.71, z=1376.24], qc['Creeper'/1217, l='MpServer', x=-732.50, y=25.00, z=1327.06], qn['Skeleton'/1216, l='MpServer', x=-782.50, y=33.00, z=1360.50], qc['Creeper'/1219, l='MpServer', x=-646.58, y=29.00, z=1366.50], qr['Zombie'/1218, l='MpServer', x=-733.09, y=35.00, z=1319.50], oy['Chicken'/1229, l='MpServer', x=-676.22, y=67.00, z=1315.47], qc['Creeper'/1228, l='MpServer', x=-772.03, y=21.00, z=1417.44], px['item.item.arrow'/1231, l='MpServer', x=-650.19, y=66.13, z=1349.84], px['item.item.bone'/1230, l='MpServer', x=-647.47, y=63.13, z=1350.88], qc['Creeper'/1225, l='MpServer', x=-757.13, y=37.00, z=1339.84], qp['Spider'/1224, l='MpServer', x=-760.94, y=37.95, z=1339.72], ow['Bat'/1227, l='MpServer', x=-669.59, y=21.29, z=1333.43], qr['Zombie'/1226, l='MpServer', x=-664.50, y=15.00, z=1330.50], qn['Skeleton'/1237, l='MpServer', x=-771.50, y=22.00, z=1332.50], qn['Skeleton'/1238, l='MpServer', x=-781.50, y=30.00, z=1334.50], qr['Zombie'/1239, l='MpServer', x=-769.31, y=36.00, z=1337.31], pd['Pig'/1232, l='MpServer', x=-687.84, y=69.00, z=1448.75], pd['Pig'/1233, l='MpServer', x=-752.06, y=81.00, z=1451.66], qn['Skeleton'/1234, l='MpServer', x=-767.50, y=81.00, z=1433.93], oy['Chicken'/1235, l='MpServer', x=-771.53, y=75.25, z=1437.84], qn['Skeleton'/1245, l='MpServer', x=-661.56, y=25.00, z=1336.13], qc['Creeper'/1246, l='MpServer', x=-647.50, y=19.00, z=1431.50], qo['Slime'/1247, l='MpServer', x=-642.66, y=36.00, z=1436.06], qn['Skeleton'/1483, l='MpServer', x=-660.50, y=25.00, z=1370.50], qc['Creeper'/1240, l='MpServer', x=-763.99, y=37.00, z=1338.69], qn['Skeleton'/1482, l='MpServer', x=-661.50, y=25.00, z=1371.50], qr['Zombie'/1241, l='MpServer', x=-771.13, y=36.00, z=1336.16], qn['Skeleton'/1481, l='MpServer', x=-663.50, y=25.00, z=1366.50], qc['Creeper'/1242, l='MpServer', x=-759.00, y=28.00, z=1316.53], qn['Skeleton'/1480, l='MpServer', x=-666.50, y=25.00, z=1362.50], pd['Pig'/1254, l='MpServer', x=-735.73, y=81.00, z=1457.31], qc['Creeper'/1253, l='MpServer', x=-731.50, y=11.00, z=1457.50], ph['Squid'/1251, l='MpServer', x=-645.72, y=60.03, z=1438.56], ph['Squid'/1250, l='MpServer', x=-647.56, y=59.09, z=1430.91], ph['Squid'/1249, l='MpServer', x=-648.13, y=58.00, z=1423.06], qn['Skeleton'/1248, l='MpServer', x=-654.50, y=36.00, z=1437.50], qc['Creeper'/1261, l='MpServer', x=-626.13, y=32.00, z=1395.72], qp['Spider'/1259, l='MpServer', x=-632.50, y=28.00, z=1374.50], qn['Skeleton'/1258, l='MpServer', x=-632.50, y=29.00, z=1366.50], qc['Creeper'/1268, l='MpServer', x=-631.50, y=26.00, z=1346.50], oy['Chicken'/1266, l='MpServer', x=-737.44, y=66.00, z=1303.44], oy['Chicken'/1267, l='MpServer', x=-688.56, y=70.00, z=1307.67], qn['Skeleton'/1264, l='MpServer', x=-784.50, y=33.00, z=1358.50], qr['Zombie'/1273, l='MpServer', x=-650.13, y=30.00, z=1441.53], qc['Creeper'/1304, l='MpServer', x=-643.97, y=66.00, z=1312.59], qr['Zombie'/1282, l='MpServer', x=-772.50, y=56.00, z=1309.13], oy['Chicken'/1176, l='MpServer', x=-729.34, y=83.00, z=1389.38], px['item.item.egg'/1177, l='MpServer', x=-725.56, y=84.13, z=1379.81], qc['Creeper'/1280, l='MpServer', x=-755.50, y=35.00, z=1303.50], qn['Skeleton'/1178, l='MpServer', x=-726.50, y=77.00, z=1407.50], qr['Zombie'/1281, l='MpServer', x=-761.99, y=56.00, z=1308.50], qc['Creeper'/1179, l='MpServer', x=-729.31, y=79.00, z=1407.56], pd['Pig'/1181, l='MpServer', x=-730.91, y=82.00, z=1364.94], qp['Spider'/1182, l='MpServer', x=-718.25, y=89.00, z=1423.75], ow['Bat'/1285, l='MpServer', x=-639.25, y=39.10, z=1340.34], oy['Chicken'/1183, l='MpServer', x=-748.07, y=81.00, z=1371.47], qr['Zombie'/1187, l='MpServer', x=-693.06, y=47.00, z=1341.56], qc['Creeper'/1186, l='MpServer', x=-749.50, y=37.00, z=1345.50], pd['Pig'/1185, l='MpServer', x=-692.34, y=79.00, z=1412.17], pd['Pig'/1184, l='MpServer', x=-689.66, y=75.00, z=1413.53], oy['Chicken'/1191, l='MpServer', x=-762.18, y=68.00, z=1378.48], qc['Creeper'/1190, l='MpServer', x=-767.50, y=25.00, z=1380.50], pd['Pig'/1189, l='MpServer', x=-670.13, y=67.00, z=1414.63], qc['Creeper'/1188, l='MpServer', x=-683.50, y=66.00, z=1356.50], qc['Creeper'/1195, l='MpServer', x=-728.08, y=80.00, z=1437.26], qc['Creeper'/1194, l='MpServer', x=-722.00, y=79.00, z=1436.53], pd['Pig'/1193, l='MpServer', x=-714.19, y=89.00, z=1418.50], qr['Zombie'/1192, l='MpServer', x=-712.09, y=80.00, z=1432.50], px['item.item.egg'/1199, l='MpServer', x=-699.28, y=67.13, z=1342.84], qr['Zombie'/1198, l='MpServer', x=-695.38, y=47.00, z=1336.06], px['item.item.chickenRaw'/1197, l='MpServer', x=-735.47, y=64.13, z=1341.81], px['item.item.feather'/1196, l='MpServer', x=-734.59, y=64.13, z=1341.53], qn['Skeleton'/1202, l='MpServer', x=-657.88, y=16.00, z=1367.53], qn['Skeleton'/1203, l='MpServer', x=-661.50, y=16.00, z=1369.13], qn['Skeleton'/1200, l='MpServer', x=-661.50, y=14.00, z=1365.50], qn['Skeleton'/1201, l='MpServer', x=-663.50, y=14.00, z=1363.50], pd['Pig'/1206, l='MpServer', x=-668.75, y=67.00, z=1409.63], qn['Skeleton'/1207, l='MpServer', x=-682.06, y=71.00, z=1437.50], qc['Creeper'/1204, l='MpServer', x=-754.50, y=37.00, z=1347.50], px['item.item.rottenFlesh'/1205, l='MpServer', x=-660.88, y=66.13, z=1415.00], qr['Zombie'/1210, l='MpServer', x=-779.56, y=70.00, z=1379.97], oy['Chicken'/1211, l='MpServer', x=-779.53, y=70.00, z=1381.44], qc['Creeper'/1209, l='MpServer', x=-771.50, y=67.00, z=1384.01], qc['Creeper'/1214, l='MpServer', x=-725.59, y=15.00, z=1448.00], pd['Pig'/1215, l='MpServer', x=-721.25, y=82.00, z=1447.09], px['item.item.arrow'/1212, l='MpServer', x=-718.34, y=70.13, z=1314.06], px['item.item.bone'/1213, l='MpServer', x=-718.78, y=70.13, z=1316.50]]
Retry entities: 0 total; []
Stacktrace:
at ayp.a(WorldClient.java:439)
at net.minecraft.client.Minecraft.b(Minecraft.java:2409)
at net.minecraft.client.Minecraft.run(Minecraft.java:789)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_11, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 585692744 bytes (558 MB) / 868024320 bytes (827 MB) up to 5726666752 bytes (5461 MB)
JVM Flags: 1 total; -Xmx6144m
AABB Pool Size: 19635 (1099560 bytes; 1 MB) allocated, 1239 (69384 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v7.26a FML v4.7.35.556 Minecraft Forge 6.6.2.534 47 mods loaded, 47 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
NotEnoughItems [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
PowerCrystalsCore [PowerCrystals Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod_bspkrsCore [bspkrsCore] (bspkrsCore-v1.01.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
IC2 [IndustrialCraft 2] (industrialcraft2-v1.112.170.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
AdvancedMachines [IC2 Advanced Machines Addon] (AdvancedMachines-v1.4.6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
AdvancedPowerManagement [Advanced Power Management] (AdvancedPowerManagement-v1.1.55.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
AppliedEnergistics [Applied Energistics] (appeng-vrv9a.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
AtmosMobs [Atmosmobs mod] (AtmosMobs-v1.3.2b.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Backpack [Backpack] (backpack-v1.6.8.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BasicComponents [Basic Components] (BasicComponents-v1.2.6.339.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Core [BuildCraft] (buildcraft-v3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Builders [BC Builders] (buildcraft-v3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Energy [BC Energy] (buildcraft-v3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Factory [BC Factory] (buildcraft-v3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Transport [BC Transport] (buildcraft-v3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Silicon [BC Silicon] (buildcraft-v3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ComputerCraft [ComputerCraft] (ComputerCraft-v1.5.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
CCCable [ComputerCraft Peripheral Cables] (cccable-v1.4.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
CompactSolars [Compact Solar Arrays] (compactsolars-v3.2.0.21.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
CCTurtle [ComputerCraft Turtles] (ComputerCraft-v1.5.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
kirsybuuDoubleDoorMod [Double Door Mod] (doubledoor-forge-v4.5.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Lepko-EasyCrafting [Easy Crafting] (EasyCrafting-v1.1.3.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ExtrabiomesXL [ExtrabiomesXL] (ExtrabiomesXL-v3.10.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Forestry [Forestry for Minecraft] (forestry.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
GalacticraftCore [Galacticraft Core] (Galacticraft-va0.0.14.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
TwilightForest [The Twilight Forest] (The-Twilight-Forest-Mod-1.4.6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
XyCraft [§3XyCraft] (xycraft-1.4.7-0.10.18.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
GregTech_Addon [GregTech-Addon] (GregTech.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ICBM|Contraption [ICBM|Contraption] (ICBM_Contraption-v1.0.5.166.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ICBM|Sentry [ICBM|Sentry] (ICBM_Sentry-v1.0.5.166.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ICBM|Explosion [ICBM|Explosion] (ICBM_Explosion-v1.0.5.166.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod_InvTweaks [Inventory Tweaks] (InvTweaks-v1.50.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
minechem [MineChem] (MineChem-v2.0.0pr6.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mmmPowersuits [MachineMuse's Modular Powersuits] (ModularPowersuits-v0.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Mystcraft [Mystcraft] (mystcraft.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Thaumcraft [Thaumcraft] (Thaumcraft.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
OCS [OpenCCSensors] (OpenCCSensors-v0.1.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
drceph.petrogen [Petroleum Generator] (PetroGen-v1.2.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
PowerConverters [Power Converters] (PowerConverters-v2.2.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod_ReiMinimap [mod_ReiMinimap] (ReiMinimap-v3.2_06.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
WR-CBE|Core [WR-CBE Core] (WR-CBE Core-v1.3.2.8.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
XyCraftWorld [§2XyCraft World] (xycraft-1.4.7-0.10.18.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
XyCraftMachines [§9XyCraft Machines] (xycraft-1.4.7-0.10.18.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
LWJGL: 2.4.2
OpenGL: AMD Radeon HD 7700 Series GL version 4.2.12002 Compatibility Profile Context 9.12.0.0, ATI Technologies Inc.
Is Modded: Definitely; Client brand changed to 'forge,fml'
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: 2330 (130480 bytes; 0 MB) allocated, 385 (21560 bytes; 0 MB) used