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Here is my log

---- Minecraft Crash Report ----
// Don't do that.

Time: 11/3/14 10:38 AM
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
at net.minecraft.item.ItemStack.func_77960_j(ItemStack.java:215)
at net.minecraft.block.BlockChest.func_149749_a(BlockChest.java:366)
at net.minecraft.world.chunk.Chunk.func_150807_a(Chunk.java:600)
at net.minecraft.world.World.func_147465_d(World.java:441)
at net.minecraft.world.World.func_147468_f(World.java:549)
at net.minecraft.block.Block.onBlockExploded(Block.java:1726)
at net.minecraft.world.Explosion.func_77279_a(Explosion.java:214)
at net.minecraft.world.WorldServer.func_72885_a(WorldServer.java:912)
at net.minecraft.world.World.func_72876_a(World.java:2352)
at atomicstryker.battletowers.common.AS_TowerDestroyer.update(AS_TowerDestroyer.java:78)
at atomicstryker.battletowers.common.ServerTickHandler.onTick(ServerTickHandler.java:33)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_8_ServerTickHandler_onTick_WorldTickEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:51)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:122)
at cpw.mods.fml.common.FMLCommonHandler.onPostWorldTick(FMLCommonHandler.java:255)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:645)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:186)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)


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

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_67, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 149998016 bytes (143 MB) / 611008512 bytes (582 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: 12, tallocated: 94
FML: MCP v9.05 FML v7.10.18.1180 Minecraft Forge 10.13.0.1180 Optifine OptiFine_1.7.10_HD_U_A4 31 mods loaded, 31 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{7.10.18.1180} [Forge Mod Loader] (forge-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{10.13.0.1180} [Minecraft Forge] (forge-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
hearts{1.0} [Hearts] ([1.7.10][1.7.2] Heart Crystal 1.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DamageIndicatorsMod{3.2.0} [Damage Indicators] ([1.7.10]DamageIndicatorsMod-3.2.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AnimationAPI{1.2.2} [AnimationAPI] (AnimationAPI-1.7.2-1.2.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BattleTowers{1.4.9} [Battle Towers] (BattleTowers-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
examplemod{1.0} [examplemod] (Colorful-Armor-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
colorfularmor{1.7.10-2.1} [Colorful Armor] (Colorful-Armor-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
craftguide{1.6.8.1} [CraftGuide] (CraftGuide-Mod-1.7.10.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights{1.3.7} [Dynamic Lights] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_onFire{1.0.4} [Dynamic Lights Burning Entity Module] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_creepers{1.0.4} [Dynamic Lights Creeper Module] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_dropItems{1.0.7} [Dynamic Lights EntityItem Module] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_entityClasses{1.0.1} [Dynamic Lights Entity Light Module] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_mobEquipment{1.0.7} [Dynamic Lights Mob Equipment Light Module] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_flameArrows{1.0.0} [Dynamic Lights Fiery Arrows Light Module] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_floodLights{1.0.1} [Dynamic Lights Flood Light] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_otherPlayers{1.0.7} [Dynamic Lights OtherPlayers Light Module] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DynamicLights_thePlayer{1.1.3} [Dynamic Lights Player Light Module] (DynamicLights-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ghostmod{2.0 Pre-Release} [Ghosts and Ghouls Pre-Release] (Ghosts and Ghouls Pre-Release 2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
InfernalMobs{1.5.9} [Infernal Mobs] (InfernalMobs-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
meteors{2.13.1} [Falling Meteors] (meteors-1.7.10-2.13.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
millenaire{5.3.0} [Millénaire] (millenaire-5.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MSM3{3.0.0d} [More Swords 3] (MSM-SNAP-3.0.0e-For-MC-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MutantCreatures{1.4.5} [Mutant Creatures] (MutantCreatures-1.7.2-1.4.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
pchan3{0.7} [PChan3 mods] (SteamShip-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
stillhungry{1.7.2-2.1.0} [Still Hungry!] (stillhungry-1.7.2-2.1.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
reaper_waterpipe{1.1} [Water Pipe mod] (Waterpipe1.1[1.7.10].jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
weaponmod{1.7.2 v1.14.2} [Balkon's WeaponMod] (weaponmod-1.14.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
wildcaves3{0.4.3.6} [Wild Caves 3] (Wild-Caves-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['WoterX'/150, l='New', x=243.62, y=127.81, z=349.62]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'



Thank you!

Just based on version, throw out Mutant Creatures. There could be other problems yet for less obvious reasons. You can try adding a few mods at a time to make it easier to find the cultprit(s).