Bukkit

What steps will reproduce the problem?
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What is the expected output? What do you see instead?

What version of the product are you using?

Do you have an error log of what happened?

Please provide any additional information below.

I dont know what any of that means those questions but can you help me with the Server Console it keeps saying this...

07.01 22:06:33 [Server] INFO ... 3 more
07.01 22:06:33 [Server] INFO at org.bukkit.craftbukkit.v1_4_6.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
07.01 22:06:33 [Server] INFO at org.bukkit.craftbukkit.v1_4_6.scheduler.CraftTask.run(CraftTask.java:53)
07.01 22:06:33 [Server] INFO at com.zone.vchest.VirtualChestPlugin$1.run(VirtualChestPlugin.java:221)
07.01 22:06:33 [Server] INFO at com.zone.vchest.VirtualChestWorker.save(VirtualChestWorker.java:459)
07.01 22:06:33 [Server] INFO Caused by: java.lang.NullPointerException
07.01 22:06:33 [Server] INFO at java.lang.Thread.run(Unknown Source)
07.01 22:06:33 [Server] INFO at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
07.01 22:06:33 [Server] INFO at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
07.01 22:06:33 [Server] INFO at org.bukkit.craftbukkit.v1_4_6.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
07.01 22:06:33 [Server] SEVERE org.apache.commons.lang.UnhandledException: Plugin VirtualChest v5.6.5 generated an exception while executing task 1386
07.01 22:06:33 [Server] SEVERE Exception in thread "pool-1-thread-112"