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java.lang.NullPointerException: 	at tconstruct.util.player.TPlayerHandler.onPlayerChangedDimension(TPlayerHandler.java:271)	at cpw.mods.fml.common.registry.GameRegistry.onPlayerChangedDimension(GameRegistry.java:445)	at net.minecraft.server.management.ServerConfigurationManager.moveToWorld(ServerConfigurationManager.java:802)	at net.minecraft.server.management.ServerConfigurationManager.moveToWorld(ServerConfigurationManager.java:648)	at org.bukkit.craftbukkit.v1_6_R3.entity.CraftPlayer.teleport(CraftPlayer.java:411)	at org.bukkit.craftbukkit.v1_6_R3.entity.CraftEntity.teleport(CraftEntity.java:406)	at me.Opgesnoven.sj.Main.onJoin(Main.java:131)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:435)	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:31)	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java)	at net.minecraft.server.management.ServerConfigurationManager.func_72377_c(ServerConfigurationManager.java:325)	at net.minecraft.server.management.ServerConfigurationManager.func_72355_a(ServerConfigurationManager.java:186)	at net.minecraft.network.NetLoginHandler.completeConnection(NetLoginHandler.java:223)	at cpw.mods.fml.common.network.FMLNetworkHandler.handleClientConnection(FMLNetworkHandler.java:168)	at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionReceivedFromClient(FMLNetworkHandler.java:121)	at net.minecraft.network.NetLoginHandler.func_72529_d(NetLoginHandler.java:198)	at net.minecraft.network.NetLoginHandler.func_72532_c(NetLoginHandler.java:82)	at net.minecraft.server.ServerListenThread.func_71766_a(ServerListenThread.java:57)	at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(DedicatedServerListenThread.java:33)	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:396)	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:330)	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:275)	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:164)	at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)