Mindcrack server crash error

---- Minecraft Crash Report ----
// There are four lights!

Time: 1/27/13 7:43 PM
Description: Ticking entity

javax.management.RuntimeErrorException: NOT IMPLEMENTED
	at buildcraft.core.EntityRobot.build(EntityRobot.java:223)
	at buildcraft.core.EntityRobot.j_(EntityRobot.java:136)
	at yc.a(World.java:2295)
	at in.a(WorldServer.java:647)
	at yc.g(World.java:2257)
	at yc.h(World.java:2103)
	at in.h(WorldServer.java:516)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:679)
	at ho.r(DedicatedServer.java:270)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:598)
	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 buildcraft.core.EntityRobot.build(EntityRobot.java:223)
	at buildcraft.core.EntityRobot.j_(EntityRobot.java:136)
	at yc.a(World.java:2295)
	at in.a(WorldServer.java:647)
	at yc.g(World.java:2257)

-- Entity being ticked --
Details:
	Entity Type: null (buildcraft.core.EntityRobot)
	Entity ID: 435
	Name: unknown
	Exact location: -375.33, 54.67, -1076.00
	Block location: World: (-376,54,-1076), Chunk: (at 8,3,12 in -24,-68; contains blocks -384,0,-1088 to -369,255,-1073), Region: (-1,-3; contains chunks -32,-96 to -1,-65, blocks -512,0,-1536 to -1,255,-1025)
	Momentum: -0.01, -0.01, 0.00
Stacktrace:
	at yc.h(World.java:2103)
	at in.h(WorldServer.java:516)

-- Affected level --
Details:
	Level name: world
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 762 Drop: 0
	Level seed: -2003472806004669190
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options:
	Level spawn location: World: (148,64,256), Chunk: (at 4,4,0 in 9,16; contains blocks 144,0,256 to 159,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 13278824 game time, 248160 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 66394 (now: false), thunder time: 42980 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:679)
	at ho.r(DedicatedServer.java:270)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:598)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
	at fy.run(SourceFile:849)

-- System Details --
Details:
	Minecraft Version: 1.4.6
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 392647976 bytes (374 MB) / 531038208 bytes (506 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512M -Xmx1G
	AABB Pool Size: 4486 (251216 bytes; 0 MB) allocated, 4437 (248472 bytes; 0 MB) used
	Suspicious classes: FML and Forge are installed
	IntCache: cache: 0, tcache: 1, allocated: 4, tallocated: 60
	FML: MCP v7.25 FML v4.6.17.515 Minecraft Forge 6.5.0.489 55 mods loaded, 55 mods active
	mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	mod_CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	mod_NotEnoughItems [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	BuildCraft|Core [BuildCraft] (buildcraft-A-3.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	BuildCraft|Energy [BC Energy] (buildcraft-A-3.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ExtrabiomesXL [ExtrabiomesXL] (ExtrabiomesXL-universal-1.4.7-3.8.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	Forestry [Forestry for Minecraft] (forestry-A-1.7.0.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	IC2 [IndustrialCraft 2] (industrialcraft-2_1.112.170-lf.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	drceph.petrogen [Petroleum Generator] ([1.4.6]PetroGen-1.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	AdvancedMachines [IC2 Advanced Machines Addon] (AdvancedMachines_4.7a.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	BuildCraft|Builders [BC Builders] (buildcraft-A-3.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	BuildCraft|Factory [BC Factory] (buildcraft-A-3.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	BuildCraft|Transport [BC Transport] (buildcraft-A-3.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	BuildCraft|Silicon [BC Silicon] (buildcraft-A-3.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ChickenChunks [ChickenChunks] (ChickenChunks 1.2.1.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ComputerCraft [ComputerCraft] (ComputerCraft1.481.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	CCTurtle [ComputerCraft Turtles] (ComputerCraft1.481.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	EnderStorage [EnderStorage] (EnderStorage 1.3.1.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	BinnieCore [Binnie Core] (extrabees-1.4.9.12-prerelease.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ExtraBees [Extra Bees] (extrabees-1.4.9.12-prerelease.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	factorization [Factorization] (Factorization-0.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	IC2NuclearControl [Nuclear Control] (IC2NuclearControl-1.4.5.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	IronChest [Iron Chest] (ironchest-universal-1.4.7-4.5.2.213.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	MiscPeripherals [MiscPeripherals] (miscperipherals-2.3.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	AdvancedSolarPanel [Advanced Solar Panels] (mod_AdvancedSolarPanels_3_3_2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	GraviSuite [Gravitation Suite] (mod_zGraviSuite_1_6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ModularForceFieldSystem [Modular ForceField System V2] (ModularForceFieldSystemV2.2.8.2.14.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ObsidiPlates [Obsidian Pressure Plates] (obsidiplates-universal-1.2.0.3.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	OmniTools [OmniTools] (OmniTools-2.2.5.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	PortalGun [Portal Gun] (PortalGun1.4.7v2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	Railcraft [Railcraft] (Railcraft_1.4.6-6.13.1.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	RedPowerCore [RedPower] (RedPowerCore-2.0pr6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	RedPowerBase [RP Base] (RedPowerCore-2.0pr6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	RedPowerMachine [RP Machine] (RedPowerMechanical-2.0pr6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	RedPowerCompat [RP Compat] (RedPowerCompat-2.0pr6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	RedPowerWiring [RP Wiring] (RedPowerDigital-2.0pr6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	RedPowerLogic [RP Logic] (RedPowerDigital-2.0pr6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	RedPowerLighting [RP Lighting] (RedPowerDigital-2.0pr6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	RedPowerWorld [RP World] (RedPowerMechanical-2.0pr6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	RedPowerControl [RP Control] (RedPowerMechanical-2.0pr6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	SoulShards [SoulShards] (SoulShards-v1.26-universal.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	StevesCarts [Steve's Carts] (StevesCarts2.0.0.a42.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	Thaumcraft [Thaumcraft] (Thaumcraft3.0.1c.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ThermalExpansion [Thermal Expansion] (ThermalExpansion-2.1.6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ThermalExpansion|Factory [Factory] (ThermalExpansion-2.1.6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ThermalExpansion|Energy [Energy] (ThermalExpansion-2.1.6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ThermalExpansion|Transport [Transport] (ThermalExpansion-2.1.6.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	TC [Traincraft] (Traincraft-3.1.13_010.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	TwilightForest [The Twilight Forest] (twilightforest-1.14.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	WR-CBE|Core [WR-CBE Core] (WR-CBE Core 1.3.2.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	WR-CBE|Addons [WR-CBE Addons] (WR-CBE Addons 1.3.2.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	WR-CBE|RedPower [WR-CBE RedPower] (WR-CBE RedPower 1.3.2.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	XyCraft [XyCraft] (xycraft-universal-1.4.6-0.9.44.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 666 (37296 bytes; 0 MB) allocated, 644 (36064 bytes; 0 MB) used
	Player Count: 0 / 10; []
	Is Modded: Definitely; Server brand changed to 'fml'
	Type: Dedicated Server (map_server.txt)