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java.lang.NullPointerException: Exception in server tick loop	at rtg.event.EventManagerRTG.onGetVillageBlockID(EventManagerRTG.java:193)	at cpw.mods.fml.common.eventhandler.ASMEventHandler_337_EventManagerRTG_onGetVillageBlockID_GetVillageBlockID.invoke(.dynamic)	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)	at net.minecraft.world.gen.structure.StructureVillagePieces$Village.func_151558_b(StructureVillagePieces.java:1630)	at net.minecraft.world.gen.structure.StructureVillagePieces$Village.func_151549_a(StructureVillagePieces.java:1703)	at net.minecraft.world.gen.structure.StructureVillagePieces$Well.func_74875_a(StructureVillagePieces.java:1762)	at net.minecraft.world.gen.structure.StructureStart.func_75068_a(StructureStart.java:44)	at net.minecraft.world.gen.structure.MapGenStructure.func_75051_a(MapGenStructure.java:93)	at com.xcompwiz.mystcraft.symbol.symbols.SymbolVillages$Populator.populate(SymbolVillages.java:42)	at com.xcompwiz.mystcraft.world.AgeController.populate(AgeController.java:572)	at com.xcompwiz.mystcraft.world.ChunkProviderMyst.func_73153_a(ChunkProviderMyst.java:169)	at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:279)	at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1055)	at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)	at com.xcompwiz.mystcraft.world.profiling.WorldProviderMystDummy$ChunkProviderServerDummy.originalLoadChunk(WorldProviderMystDummy.java:62)	at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)	at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)	at com.xcompwiz.mystcraft.world.profiling.WorldProviderMystDummy.generateNextChunk(WorldProviderMystDummy.java:217)	at com.xcompwiz.mystcraft.world.profiling.InstabilityDataCalculator.stepChunkGeneration(InstabilityDataCalculator.java:343)	at com.xcompwiz.mystcraft.world.profiling.InstabilityDataCalculator.onServerTick(InstabilityDataCalculator.java:180)	at cpw.mods.fml.common.eventhandler.ASMEventHandler_559_InstabilityDataCalculator_onServerTick_ServerTickEvent.invoke(.dynamic)	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)	at cpw.mods.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:247)	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:590)	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:396)	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)