Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at joshie.harvest.tools.items.ItemWateringCan.attemptToFill(ItemWateringCan.java:159)
at joshie.harvest.tools.items.ItemWateringCan.func_77659_a(ItemWateringCan.java:141)
at net.minecraft.item.ItemStack.func_77957_a(ItemStack.java:160)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_187101_a(PlayerControllerMP.java:485)
at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1543)
at net.minecraft.client.Minecraft.func_184117_aA(Minecraft.java:2176)
at net.minecraft.client.Minecraft.func_184118_az(Minecraft.java:1960)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1748)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1056)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:369)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

using Harvest-Festival-1.9.4-0.5.0-39.jar

Greetings from BTM