Minecraft Advanced Machine Crash

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 1/2/13 6:47 PM
Description: Exception in server tick loop

java.lang.NullPointerException
	at ic2.advancedmachines.common.TileEntityAdvancedMachine.operate(TileEntityAdvancedMachine.java:210)
	at ic2.advancedmachines.common.TileEntityAdvancedMachine.g(TileEntityAdvancedMachine.java:96)
	at xe.h(World.java:2020)
	at ie.h(WorldServer.java:463)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:649)
	at hg.r(DedicatedServer.java:241)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:585)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:492)
	at fp.run(SourceFile:818)

Relevant Details:
- Minecraft Version: 1.4.2
- Operating System: Mac OS X (x86_64) version 10.7.5
- Java Version: 1.6.0_37, Apple Inc.
- Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
- Memory: 1045536920 bytes (997 MB) / 1187315712 bytes (1132 MB) up to 4277534720 bytes (4079 MB)
- JVM Flags: 2 total; -Xms1G -Xmx4G
- AABB Pool Size: 9061 (507416 bytes; 0 MB) allocated, 8355 (467880 bytes; 0 MB) used
- FML: ~ERROR~ NullPointerException: null
- Is Modded: Definitely; 'forge,fml'
- Profiler Position: N/A (disabled)
- Vec3 Pool Size: 1252 (70112 bytes; 0 MB) allocated, 1238 (69328 bytes; 0 MB) used
- Player Count: 1 / 25; [ih['unknown_acolyte'/123, l='FeedTheBeast', x=-739.68, y=63.00, z=-292.77]]
- World FeedTheBeast Entities: 0 total; []
- World FeedTheBeast Players: 0 total; []
- World FeedTheBeast Chunk Stats: ServerChunkCache: 0 Drop: 0
- Type: Dedicated Server