RecipeManager Exception

# This is the error

07:38 PM [WARNING] [RecipeManager] Task #376 for RecipeManager v2.0 generated an exception
java.lang.NullPointerException
    at net.minecraft.server.v1_5_R3.ItemStack.usesData(ItemStack.java:138)
    at net.minecraft.server.v1_5_R3.ItemStack.setData(ItemStack.java:161)
    at net.minecraft.server.v1_5_R3.ItemStack.<init>(ItemStack.java:44)
    at org.bukkit.craftbukkit.v1_5_R3.inventory.CraftItemStack.asNMSCopy(CraftItemStack.java:33)
    at org.bukkit.craftbukkit.v1_5_R3.inventory.CraftShapedRecipe.addToCraftingManager(CraftShapedRecipe.java:62)
    at org.bukkit.craftbukkit.v1_5_R3.CraftServer.addRecipe(CraftServer.java:897)
    at org.bukkit.Bukkit.addRecipe(Bukkit.java:209)
    at ro.thehunters.digi.recipeManager.Recipes.registerRecipe(Recipes.java:353)
    at ro.thehunters.digi.recipeManager.RecipeRegistrator.registerRecipesToServer(RecipeRegistrator.java:156)
    at ro.thehunters.digi.recipeManager.RecipeProcessor$1.run(RecipeProcessor.java:195)
    at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftTask.run(CraftTask.java:53)
    at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
    at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:513)
    at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
    at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
    at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
    at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)

# These are the two lines of message I receive

07:38 PM [INFO] [0;32;1m[DEBUG]Events.java:1390 [0;31;1mfindFurnaces() [0;37;1mLoading error for chunk at 48, 88, attempting workaround...
07:39 PM [INFO] [0;32;1m[DEBUG]Events.java:1390 [0;31;1mfindFurnaces() [0;37;1mLoading error for chunk at 48, 88, attempting workaround...