[19:41:06 ERROR]: Exception caught during firing event net.minecraftforge.event.world.ChunkDataEvent$Save@eed5676:
java.lang.NullPointerException
        at codechicken.lib.world.WorldExtension.saveChunkData(WorldExtension.java:62) ~[WorldExtension.class:?]
        at codechicken.lib.world.WorldExtensionManager$WorldExtensionEventHandler.onChunkDataSave(WorldExtensionManager.java:42) ~[WorldExtensionManager$Worl
dExtensionEventHandler.class:?]
        at cpw.mods.fml.common.eventhandler.ASMEventHandler_800_WorldExtensionEventHandler_onChunkDataSave_Save.invoke(.dynamic) ~[?:?]
        at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:1.7.10-1517.167]
        at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140) [EventBus.class:1.7.10-1517.167]
        at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:219) [aqk.class:?]
        at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:358) [ms.class:?]
        at net.minecraft.world.gen.ChunkProviderServer.func_73151_a(ChunkProviderServer.java:438) [ms.class:?]
        at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:1054) [mt.class:?]
        at net.minecraft.server.MinecraftServer.func_71267_a(MinecraftServer.java:531) [MinecraftServer.class:?]
        at kcauldron.KCauldronWorldSaveThread.run(KCauldronWorldSaveThread.java:39) [KCauldronWorldSaveThread.class:1.7.10-1517.167]
[19:41:06 ERROR]: Index: 9 Listeners:
[19:41:06 ERROR]: 0: NORMAL
[19:41:06 ERROR]: 1: ASM: thaumcraft.common.lib.events.EventHandlerWorld@354f8e4c chunkSave(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:41:06 ERROR]: 2: ASM: mods.natura.Natura@fa14fd9 chunkDataSave(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:41:06 ERROR]: 3: ASM: cofh.core.world.WorldHandler@6eef5b8e handleChunkSaveEvent(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:41:06 ERROR]: 4: ASM: erogenousbeef.bigreactors.common.BREventHandler@221ee8d2 chunkSave(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:41:06 ERROR]: 5: ASM: mods.natura.worldgen.retro.WorldHandler@6f177a1f handleChunkSaveEvent(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:41:06 ERROR]: 6: ASM: mrtjp.core.world.SimpleGenHandler$@26134dfe chunkSaveEvent(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:41:06 ERROR]: 7: ASM: com.rwtema.denseores.WorldGenOres@6a88d34f retroGenSave(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:41:06 ERROR]: 8: ASM: forestry.core.TickHandlerCoreServer@53a4be66 chunkSaveEventHandler(Lnet/minecraftforge/event/world/ChunkDataEvent$Save;)V
[19:41:06 ERROR]: 9: ASM: codechicken.lib.world.WorldExtensionManager$WorldExtensionEventHandler@133c5fc4 onChunkDataSave(Lnet/minecraftforge/event/world/Chu
nkDataEvent$Save;)V
[19:41:06 WARN]: java.lang.NullPointerException
[19:41:06 WARN]:        at codechicken.lib.world.WorldExtension.saveChunkData(WorldExtension.java:62)
[19:41:06 WARN]:        at codechicken.lib.world.WorldExtensionManager$WorldExtensionEventHandler.onChunkDataSave(WorldExtensionManager.java:42)
[19:41:06 WARN]:        at cpw.mods.fml.common.eventhandler.ASMEventHandler_800_WorldExtensionEventHandler_onChunkDataSave_Save.invoke(.dynamic)
[19:41:06 WARN]:        at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
[19:41:06 WARN]:        at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
[19:41:06 WARN]:        at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:219)
[19:41:06 WARN]:        at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:358)
[19:41:06 WARN]:        at net.minecraft.world.gen.ChunkProviderServer.func_73151_a(ChunkProviderServer.java:438)
[19:41:06 WARN]:        at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:1054)
[19:41:06 WARN]:        at net.minecraft.server.MinecraftServer.func_71267_a(MinecraftServer.java:531)
[19:41:06 WARN]:        at kcauldron.KCauldronWorldSaveThread.run(KCauldronWorldSaveThread.java:39)