2013-01-19 10:44:39 [INFO] OgunReiz issued server command: /p sell bank
2013-01-19 10:44:39 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'p' in plugin PlotMe v0.11b
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
	at org.bukkit.craftbukkit.v1_4_6.CraftServer.dispatchCommand(CraftServer.java:554)
	at net.minecraft.server.v1_4_6.PlayerConnection.handleCommand(PlayerConnection.java:990)
	at net.minecraft.server.v1_4_6.PlayerConnection.chat(PlayerConnection.java:908)
	at net.minecraft.server.v1_4_6.PlayerConnection.a(PlayerConnection.java:852)
	at net.minecraft.server.v1_4_6.Packet3Chat.handle(Packet3Chat.java:44)
	at net.minecraft.server.v1_4_6.NetworkManager.b(NetworkManager.java:290)
	at net.minecraft.server.v1_4_6.PlayerConnection.d(PlayerConnection.java:112)
	at net.minecraft.server.v1_4_6.ServerConnection.b(SourceFile:39)
	at net.minecraft.server.v1_4_6.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.v1_4_6.MinecraftServer.r(MinecraftServer.java:585)
	at net.minecraft.server.v1_4_6.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_4_6.MinecraftServer.q(MinecraftServer.java:481)
	at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:416)
	at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849)
Caused by: java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:839)
	at java.util.HashMap$KeyIterator.next(HashMap.java:874)
	at com.worldcretornica.plotme.PMCommand.sell(PMCommand.java:858)
	at com.worldcretornica.plotme.PMCommand.onCommand(PMCommand.java:144)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
	... 15 more