net.minecraft.util.ReportedException: Getting block
	at net.minecraft.world.chunk.Chunk.func_150810_a(Chunk.java:559) ~[apx.class:?]
	at buildcraft.robotics.map.MapChunk.update(MapChunk.java:51) ~[MapChunk.class:?]
	at buildcraft.robotics.map.MapWorld.updateChunk(MapWorld.java:142) ~[MapWorld.class:?]
	at buildcraft.robotics.map.MapWorld.tick(MapWorld.java:129) ~[MapWorld.class:?]
	at buildcraft.robotics.map.MapManager.tickDelayedWorlds(MapManager.java:79) ~[MapManager.class:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_384_MapManager_tickDelayedWorlds_WorldTickEvent.invoke(.dynamic) ~[?:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:?]
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:142) ~[EventBus.class:?]
	at cpw.mods.fml.common.FMLCommonHandler.onPostWorldTick(FMLCommonHandler.java:260) ~[FMLCommonHandler.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:678) ~[MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:332) ~[lt.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:566) ~[MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:443) ~[MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:718) ~[li.class:?]
Caused by: java.lang.NullPointerException