2013-01-15 23:26:49 [INFO] User jmarler connecting with mods [XyCraft, ThermalExpansion, RedPowerWiring, BuildCraft|Silicon, ThermalExpansion|Transport, TwilightForest, OmniTools, BuildCraft|Transport, GraviSuite, BuildCraft|Core, IC2NuclearControl, ThermalExpansion|Factory, RedPowerCompat, RedPowerLogic, ObsidiPlates, IC2, ThermalExpansion|Energy, Thaumcraft, StevesCarts, ExtrabiomesXL, ExtraBees, drceph.petrogen, TC, Forestry, ComputerCraft, AdvancedMachines, BinnieCore, AdvancedSolarPanel, BuildCraft|Factory, RedPowerMachine, IronChest, BuildCraft|Energy, SoulShards, Railcraft, GregTech_Addon, RedPowerCore, MiscPeripherals, PortalGun, CCTurtle, ModularForceFieldSystem, RedPowerControl, factorization, RedPowerLighting, RedPowerBase, BuildCraft|Builders, RedPowerWorld]
2013-01-15 23:26:49 [INFO] jmarler[/xx.xx.xx.xx:43325] logged in with entity id 594 at (-425.6142936972865, 63.0, -793.0367892942003)
2013-01-15 23:26:50 [SEVERE] Encountered an unexpected exception t
t: Ticking entity
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:685)
	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)
Caused by: 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)
	... 4 more
2013-01-15 23:26:50 [SEVERE] This crash report has been saved to: /.../crash-reports/crash-2013-01-15_23.26.50-server.txt