Bukkit

The plugin works perfectly, but when a player kills other player a message error appears in the console: [21:59:52 ERROR]: Could not pass event PlayerDeathEvent to Multiplier v1 org.bukkit.event.EventException at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja va:320) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav a:62) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j ava:486) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j ava:471) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callPlayerDeat hEvent(CraftEventFactory.java:349) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2- R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.EntityPlayer.die(EntityPlayer.java:368) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.EntityLiving.damageEntity(EntityLiving.j ava:732) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.EntityHuman.damageEntity(EntityHuman.jav a:746) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.EntityPlayer.damageEntity(EntityPlayer.j ava:446) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.EntityHuman.attack(EntityHuman.java:918) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java :1102) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.PacketPlayInUseEntity.a(SourceFile:55) [ craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.PacketPlayInUseEntity.handle(SourceFile: 10) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146 ) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craf tbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:6 55) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:2 50) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:5 45) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java :457) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:6 17) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] Caused by: java.lang.NullPointerException at me.sooon_mitch.multiplier.Sidekick.add(Sidekick.java:20) [?:?] at me.sooon_mitch.multiplier.Events.onEntityDeath(Events.java:28) [?:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [?:1.7.0 _67] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) [?:1.7.0 _67] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) [?:1 .7.0_67] at java.lang.reflect.Method.invoke(Unknown Source) [?:1.7.0_67] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja va:318) [craftbukkit-1.7.2-R0.3.jar:git-Bukkit-1.7.2-R0.3-b3020jnks] ... 19 more