Direwolf20 error

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 1/23/13 12:09 PM
Description: Ticking entity

java.lang.NullPointerException
	at forestry.core.genetics.Chromosome.writeToNBT(Chromosome.java:50)
	at forestry.core.genetics.Genome.writeToNBT(Genome.java:58)
	at forestry.arboriculture.genetics.Tree.writeToNBT(Tree.java:75)
	at forestry.arboriculture.gadgets.TileTreeContainer.b(TileTreeContainer.java:38)
	at forestry.arboriculture.gadgets.TileLeaves.b(TileLeaves.java:32)
	at forestry.core.network.PacketTileNBT.<init>(PacketTileNBT.java:28)
	at forestry.arboriculture.gadgets.TileTreeContainer.l(TileTreeContainer.java:70)
	at iq.b(EntityPlayerMP.java:446)
	at iq.j_(EntityPlayerMP.java:269)
	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 net.minecraft.server.MinecraftServer.q(MinecraftServer.java:598)
	at bdz.q(IntegratedServer.java:123)
	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 forestry.core.genetics.Chromosome.writeToNBT(Chromosome.java:50)
	at forestry.core.genetics.Genome.writeToNBT(Genome.java:58)
	at forestry.arboriculture.genetics.Tree.writeToNBT(Tree.java:75)
	at forestry.arboriculture.gadgets.TileTreeContainer.b(TileTreeContainer.java:38)
	at forestry.arboriculture.gadgets.TileLeaves.b(TileLeaves.java:32)
	at forestry.core.network.PacketTileNBT.<init>(PacketTileNBT.java:28)
	at forestry.arboriculture.gadgets.TileTreeContainer.l(TileTreeContainer.java:70)
	at iq.b(EntityPlayerMP.java:446)
	at iq.j_(EntityPlayerMP.java:269)
	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 (iq)
	Entity ID: 588
	Name: 123pker123
	Exact location: -48.03, 83.45, 219.54
	Block location: World: (-49,83,219), Chunk: (at 15,5,11 in -4,13; contains blocks -64,0,208 to -49,255,223), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Momentum: 0.00, 0.22, 0.00
Stacktrace:
	at yc.h(World.java:2103)
	at in.h(WorldServer.java:516)

-- Affected level --
Details:
	Level name: world
	All players: 1 total; [iq['123pker123'/588, l='world', x=-48.03, y=83.45, z=219.54]]
	Chunk stats: ServerChunkCache: 1033 Drop: 0
	Level seed: -568688860
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options:
	Level spawn location: World: (248,64,256), Chunk: (at 8,4,0 in 15,16; contains blocks 240,0,256 to 255,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 10263494 game time, 121756 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 46377 (now: false), thunder time: 69751 (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 net.minecraft.server.MinecraftServer.q(MinecraftServer.java:598)
	at bdz.q(IntegratedServer.java:123)
	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: 1.6.0_21, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
	Memory: 202306952 bytes (192 MB) / 487059456 bytes (464 MB) up to 12825526272 bytes (12231 MB)
	JVM Flags: 5 total; -Xms256M -Xmx12247M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+AggressiveOpts
	AABB Pool Size: 8132 (455392 bytes; 0 MB) allocated, 7227 (404712 bytes; 0 MB) used
	Suspicious classes: FML and Forge are installed
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	FML: MCP v7.25 FML v4.6.17.515 Minecraft Forge 6.5.0.489 Feed The Beast Mod Pack 57 mods loaded, 57 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
	mod_ReiMinimap [mod_ReiMinimap] ([1.4.6]ReiMinimap_v3.2_06.zip) 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|Builders [BC Builders] (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
	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
	IC2 [IndustrialCraft 2] (industrialcraft-2_1.112.170-lf.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	ChargePads [Charge Pads] (chargepads-universal-2.3.0.58.zip) 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
	CompactSolars [Compact Solar Arrays] (compactsolars-universal-1.4.6-3.2.0.21.zip) 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
	EE3 [Equivalent Exchange 3] (ee3-universal-pre1f.jar) 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
	ExtrabiomesXL [ExtrabiomesXL] (ExtrabiomesXL-universal-1.4.7-3.8.0.jar) 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
	Forestry [Forestry for Minecraft] (forestry-A-1.7.0.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	GraviGun [GraviGun] (GravityGun1.4.6v1.zip) 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
	mod_InvTweaks [Inventory Tweaks] (InventoryTweaks_v1.49_(1.4.6).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
	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
	Mystcraft [Mystcraft] (mystcraft-uni-1.4.6-0.9.5.00.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
	NEIPlugins [NEI Plugins] (NEIPlugins-1.0.4.1.jar) 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
	ThermalExpansion|NEI [NEI] (ThermalExpansion-NEI-2.1.6.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: 1806 (101136 bytes; 0 MB) allocated, 1738 (97328 bytes; 0 MB) used
	Player Count: 1 / 8; [iq['123pker123'/588, l='world', x=-48.03, y=83.45, z=219.54]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Definitely; Client brand changed to 'forge,fml'