Here you go!

2014-02-04 12:47:34 [WARNING] [mcMMO] A valid mcMMOPlayer object could not be found for [alakazard12.robot].
2014-02-04 12:47:34 [SEVERE] Could not pass event PlayerPickupItemEvent to mcMMO v1.4.07-b3337
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:437)
	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:464)
	at net.minecraft.entity.item.EntityItem.func_70100_b_(EntityItem.java:424)
	at li.cil.oc.server.component.robot.Player$$anonfun$clickBlock$1.apply(Player.scala:285)
	at li.cil.oc.server.component.robot.Player$$anonfun$clickBlock$1.apply(Player.scala:283)
	at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
	at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
	at li.cil.oc.server.component.robot.Player.clickBlock(Player.scala:283)
	at li.cil.oc.server.component.robot.Robot.li$cil$oc$server$component$robot$Robot$$click$1(Robot.scala:356)
	at li.cil.oc.server.component.robot.Robot$$anonfun$swing$1.apply(Robot.scala:377)
	at li.cil.oc.server.component.robot.Robot$$anonfun$swing$1.apply(Robot.scala:367)
	at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
	at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)
	at li.cil.oc.server.component.robot.Robot.swing(Robot.scala:367)
	at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at li.cil.oc.server.network.Component$Callback.apply(Component.scala:144)
	at li.cil.oc.server.network.Component$class.invoke(Component.scala:75)
	at li.cil.oc.server.network.Network$ComponentConnectorBuilder$$anon$1.invoke(Network.scala:464)
	at li.cil.oc.server.component.machine.Machine.invoke(Machine.scala:218)
	at li.cil.oc.server.component.machine.NativeLuaArchitecture$$anonfun$init$23.apply(NativeLuaArchitecture.scala:465)
	at li.cil.oc.server.component.machine.NativeLuaArchitecture$$anonfun$init$23.apply(NativeLuaArchitecture.scala:460)
	at li.cil.oc.util.ExtendedLuaState$ExtendedLuaState$$anon$1.invoke(ExtendedLuaState.scala:17)
	at com.naef.jnlua.LuaState.lua_pcall(Native Method)
	at com.naef.jnlua.LuaState.call(LuaState.java:669)
	at li.cil.oc.server.component.machine.NativeLuaArchitecture.runSynchronized(NativeLuaArchitecture.scala:55)
	at li.cil.oc.server.component.machine.Machine.liftedTree1$1(Machine.scala:363)
	at li.cil.oc.server.component.machine.Machine.update(Machine.scala:362)
	at li.cil.oc.common.tileentity.Computer.func_70316_g(Computer.scala:104)
	at li.cil.oc.common.tileentity.Robot.func_70316_g(Robot.scala:288)
	at li.cil.oc.common.tileentity.RobotProxy.func_70316_g(RobotProxy.scala:64)
	at net.minecraft.world.World.func_72939_s(World.java:2694)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:887)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:330)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:781)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:663)
	at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
Caused by: java.lang.NullPointerException
	at com.gmail.nossr50.listeners.PlayerListener.onPlayerPickupItem(PlayerListener.java:302)
	at sun.reflect.GeneratedMethodAccessor37.invoke(Unknown Source)
	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)
	... 40 more