2012-12-08 02:51:15 [SEVERE] Could not pass event CreatureSpawnEvent to NetherUp v1.0.0
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:341)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at org.bukkit.craftbukkit.event.CraftEventFactory.callCreatureSpawnEvent(CraftEventFactory.java:226)
	at net.minecraft.server.World.addEntity(World.java:904)
	at net.minecraft.server.SpawnerCreature.spawnEntities(SpawnerCreature.java:158)
	at net.minecraft.server.WorldServer.doTick(WorldServer.java:157)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:569)
	at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:493)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:856)
Caused by: java.lang.NullPointerException
	at net.jmhertlein.netherup.NetherUpPlugin$MobSpawnListener.spawnRandomNetherMob(NetherUpPlugin.java:114)
	at net.jmhertlein.netherup.NetherUpPlugin$MobSpawnListener.onMobSpawn(NetherUpPlugin.java:92)
	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:601)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
	... 12 more