Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

java.lang.NullPointerException: Exception ticking world	at mine_spawner.MineSpawner.playerInteract(MineSpawner.java:91)	at cpw.mods.fml.common.eventhandler.ASMEventHandler_155_MineSpawner_playerInteract_PlayerInteractEvent.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.minecraftforge.event.ForgeEventFactory.onPlayerInteract(ForgeEventFactory.java:100)	at openmods.fakeplayer.OpenModsFakePlayer.rightClick(OpenModsFakePlayer.java:115)	at openmods.fakeplayer.OpenModsFakePlayer.equipWithAndRightClick(OpenModsFakePlayer.java:84)	at openblocks.common.tileentity.TileEntityBlockPlacer$1.usePlayer(TileEntityBlockPlacer.java:87)	at openmods.fakeplayer.FakePlayerPool$1.usePlayer(FakePlayerPool.java:30)	at openmods.fakeplayer.FakePlayerPool$1.usePlayer(FakePlayerPool.java:27)	at openmods.fakeplayer.FakePlayerPool$WorldPool.executeOnPlayer(FakePlayerPool.java:50)	at openmods.fakeplayer.FakePlayerPool.executeOnPlayer(FakePlayerPool.java:79)	at openmods.fakeplayer.FakePlayerPool.executeOnPlayer(FakePlayerPool.java:74)	at openblocks.common.tileentity.TileEntityBlockPlacer.placeBlock(TileEntityBlockPlacer.java:84)	at openblocks.common.tileentity.TileEntityBlockPlacer.func_145842_c(TileEntityBlockPlacer.java:59)	at openmods.block.OpenBlock.func_149696_a(OpenBlock.java:394)	at net.minecraft.world.WorldServer.func_147485_a(WorldServer.java:968)	at net.minecraft.world.WorldServer.func_147488_Z(WorldServer.java:955)	at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:196)	at undefined.WorldServerOF.func_72835_b(WorldServerOF.java:234)	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:625)	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:186)	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)