2012-07-14 00:19:24 [SEVERE] Could not pass event PrepareItemCraftEvent to mcjobs
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:303)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:464)
    at org.bukkit.craftbukkit.event.CraftEventFactory.callPreCraftEvent(CraftEventFactory.java:497)
    at net.minecraft.server.CraftingManager.craft(CraftingManager.java:252)
    at buildcraft.factory.TileAutoWorkbench.extractItem(TileAutoWorkbench.java:259)
    at buildcraft.factory.TileAutoWorkbench.extractItem(TileAutoWorkbench.java:286)
    at buildcraft.transport.pipes.PipeItemsWood.checkExtract(PipeItemsWood.java:127)
    at buildcraft.transport.pipes.PipeItemsWood.doWork(PipeItemsWood.java:93)
    at buildcraft.transport.TileGenericPipe.doWork(TileGenericPipe.java:199)
    at buildcraft.api.PowerProvider.update(PowerProvider.java:50)
    at buildcraft.transport.TileGenericPipe.q_(TileGenericPipe.java:147)
    at net.minecraft.server.World.tickEntities(World.java:1191)
    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:547)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:453)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
    at org.bukkit.event.inventory.InventoryEvent.getViewers(InventoryEvent.java:38)
    at com.dmgkz.mcjobs.listeners.Crafting.preCraftEvent(Crafting.java:85)
    at sun.reflect.GeneratedMethodAccessor56.invoke(Unknown Source)
    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:301)
    ... 15 more