2013-08-31 14:13:26 [SEVERE] [ForgeModLoader] A critical server error occured handling a packet, kicking 351
java.lang.NullPointerException
at com.google.common.collect.ImmutableSetMultimap$Builder.putAll(ImmutableSetMultimap.java:227)
at net.minecraftforge.common.ForgeChunkManager.forceChunk(ForgeChunkManager.java:738)
at codechicken.chunkloader.ChunkLoaderManager$TicketManager.addChunk(ChunkLoaderManager.java:112)
at codechicken.chunkloader.ChunkLoaderManager$ChunkLoaderOrganiser.forceChunks(ChunkLoaderManager.java:237)
at codechicken.chunkloader.ChunkLoaderManager$ChunkLoaderOrganiser.addChunkLoader(ChunkLoaderManager.java:184)
at codechicken.chunkloader.ChunkLoaderManager$ChunkLoaderOrganiser.updateChunkLoader(ChunkLoaderManager.java:257)
at codechicken.chunkloader.ChunkLoaderManager.updateLoader(ChunkLoaderManager.java:712)
at codechicken.chunkloader.TileChunkLoader.setShapeAndRadius(TileChunkLoader.java:52)
at codechicken.chunkloader.TileChunkLoader.activate(TileChunkLoader.java:112)
at codechicken.chunkloader.TileChunkLoaderBase.onBlockPlacedBy(TileChunkLoaderBase.java:85)
at codechicken.chunkloader.BlockChunkLoader.func_71860_a(BlockChunkLoader.java:119)
at net.minecraft.item.ItemBlock.placeBlockAt(ItemBlock.java:248)
at net.minecraft.item.ItemBlock.func_77648_a(ItemBlock.java:119)
at net.minecraft.item.ItemStack.func_77943_a(ItemStack.java:149)
at net.minecraft.item.ItemInWorldManager.func_73078_a(ItemInWorldManager.java:425)
at net.minecraft.network.NetServerHandler.func_72472_a(NetServerHandler.java:553)
at net.minecraft.network.packet.Packet15Place.func_73279_a(SourceFile:58)
at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:461)
at net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.java:134)
at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:53)
at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(SourceFile:30)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:677)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:275)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:573)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:470)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)