IC2 crop-matron error

[samjddowling]

Title: IC2 crop-matron error

Version: 3.1.2

OS: Windows Server 2008 R2

Java Version: Java 7 U6

Description of Problem:

server suddenly crashes i without warning!

Error Messages:

2012-08-26 21:25:47 [sEVERE] java.lang.NullPointerException

2012-08-26 21:25:47 [sEVERE] at net.minecraft.server.ItemStack.damage(ItemStack.java:172)

2012-08-26 21:25:47 [sEVERE] at ic2.common.TileEntityCropmatron.scan(TileEntityCropmatron.java:133)

2012-08-26 21:25:47 [sEVERE] at ic2.common.TileEntityCropmatron.q_(TileEntityCropmatron.java:73)

2012-08-26 21:25:47 [sEVERE] at net.minecraft.server.World.tickEntities(World.java:1190)

2012-08-26 21:25:47 [sEVERE] at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:569)

2012-08-26 21:25:47 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

2012-08-26 21:25:47 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

2012-08-26 21:25:47 [sEVERE] Unexpected exception

java.lang.NullPointerException

at net.minecraft.server.ItemStack.damage(ItemStack.java:172)

at ic2.common.TileEntityCropmatron.scan(TileEntityCropmatron.java:133)

at ic2.common.TileEntityCropmatron.q_(TileEntityCropmatron.java:73)

at net.minecraft.server.World.tickEntities(World.java:1190)

at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:569)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

Error Log: