013-03-14 00:41:17 [SEVERE] Could not pass event EntityDamageByEntityEvent to ItemRules v1.0.8
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:35)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
        at org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.callEvent(CraftEventFactory.java:81)
        at org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:369)
        at org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:391)
        at net.minecraft.server.v1_4_R1.EntityLiving.damageEntity(EntityLiving.java:686)
        at net.minecraft.server.v1_4_R1.EntityMonster.damageEntity(EntityMonster.java:39)
        at net.minecraft.server.v1_4_R1.EntityHuman.attack(EntityHuman.java:805)
        at net.citizensnpcs.npc.ai.MCTargetStrategy.update(MCTargetStrategy.java:106)
        at net.citizensnpcs.npc.ai.CitizensNavigator.run(CitizensNavigator.java:109)
        at net.citizensnpcs.npc.CitizensNPC.update(CitizensNPC.java:214)
        at net.citizensnpcs.npc.entity.EntityHumanNPC.j_(EntityHumanNPC.java:158)
        at net.minecraft.server.v1_4_R1.World.entityJoinedWorld(World.java:1332)
        at net.minecraft.server.v1_4_R1.WorldServer.entityJoinedWorld(WorldServer.java:548)
        at net.minecraft.server.v1_4_R1.World.playerJoinedWorld(World.java:1313)
        at net.minecraft.server.v1_4_R1.World.tickEntities(World.java:1191)
        at net.minecraft.server.v1_4_R1.WorldServer.tickEntities(WorldServer.java:445)
        at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:580)
        at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
        at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
        at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
        at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NullPointerException
        at com.github.mineGeek.ItemRules.Events.Listeners.onEntityDamage(Listeners.java:396)
        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:425)
        ... 24 more