Can someone help me with this error please

2013-03-19 16:25:22 [SEVERE] [Minecraft] Encountered an unexpected exception t
t: Ticking tile entity
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:686)
at ho.r(DedicatedServer.java:269)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
at fy.run(SourceFile:849)
Caused by: java.lang.NullPointerException
at ur.d(SourceFile:121)
at ic2.core.util.StackUtil.putInInventory(StackUtil.java:114)
at ic2.core.util.StackUtil.distributeDrop(StackUtil.java:55)
at ic2.core.block.machine.tileentity.TileEntityMiner.mineBlock(TileEntityMiner.java:285)
at ic2.core.block.machine.tileentity.TileEntityMiner.mine(TileEntityMiner.java:243)
at ic2.core.block.machine.tileentity.TileEntityMiner.g(TileEntityMiner.java:79)
at yc.h(World.java:2153)
at in.h(WorldServer.java:516)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:680)
... 4 more

---- Minecraft Crash Report ----
// Why did you do that?

Time: 19.03.13 16:38
Description: Ticking tile entity

java.lang.NullPointerException
at ur.d(SourceFile:121)
at ic2.core.util.StackUtil.putInInventory(StackUtil.java:114)
at ic2.core.util.StackUtil.distributeDrop(StackUtil.java:55)
at ic2.core.block.machine.tileentity.TileEntityMiner.mineBlock(TileEntityMiner.java:285)
at ic2.core.block.machine.tileentity.TileEntityMiner.mine(TileEntityMiner.java:243)
at ic2.core.block.machine.tileentity.TileEntityMiner.g(TileEntityMiner.java:79)
at yc.h(World.java:2153)
at in.h(WorldServer.java:516)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:680)
at ho.r(DedicatedServer.java:269)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
at fy.run(SourceFile:849)

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

-- Head --
Stacktrace:
at ur.d(SourceFile:121)
at ic2.core.util.StackUtil.putInInventory(StackUtil.java:114)
at ic2.core.util.StackUtil.distributeDrop(StackUtil.java:55)
at ic2.core.block.machine.tileentity.TileEntityMiner.mineBlock(TileEntityMiner.java:285)
at ic2.core.block.machine.tileentity.TileEntityMiner.mine(TileEntityMiner.java:243)
at ic2.core.block.machine.tileentity.TileEntityMiner.g(TileEntityMiner.java:79)

-- Tile entity being ticked --
Details:
Name: Miner // ic2.core.block.machine.tileentity.TileEntityMiner
Block type: ID #0
Block data value: Unknown? (Got -1)
Block location: World: (681,65,34), Chunk: (at 9,4,2 in 42,2; contains blocks 672,0,32 to 687,255,47), Region: (1,0; contains chunks 32,0 to 63,31, blocks 512,0,0 to 1023,255,511)
Stacktrace:
at yc.h(World.java:2153)
at in.h(WorldServer.java:516)

-- Affected level --
Details:
Level name: Stromboli
All players: 1 total; [iq['Tro'/266, l='Stromboli', x=692,69, y=65,00, z=37,15]]
Chunk stats: ServerChunkCache: 1081 Drop: 0
Level seed: -1821356366686548401
Level generator: ID 04 - BIOMESOP, ver 0. Features enabled: true
Level generator options:
Level spawn location: World: (160,64,240), Chunk: (at 0,4,0 in 10,15; contains blocks 160,0,240 to 175,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 1652126 game time, 2163261 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 80773 (now: false), thunder time: 142395 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:680)
at ho.r(DedicatedServer.java:269)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
at fy.run(SourceFile:849)