my log

2013-02-25 09:07:04 [INFO] Couga issued server command: /ccgroup create
2013-02-25 09:07:11 [INFO] Couga issued server command: /ccgroup create worldBbalance
2013-02-25 09:07:20 [INFO] Couga issued server command: /money
2013-02-25 09:07:50 [INFO] Couga issued server command: /ccgroup create Nem
2013-02-25 09:08:03 [INFO] Couga issued server command: /wp tp Nemland
2013-02-25 09:08:08 [INFO] Couga issued server command: /money
2013-02-25 09:08:31 [INFO] Couga issued server command: /ccgroup addworld Nem Nemland
2013-02-25 09:08:34 [INFO] Couga issued server command: /money
2013-02-25 09:10:32 [INFO] Couga issued server command: /ccgroup addworld Nem Nemland
2013-02-25 09:10:32 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'ccgroup' in plugin Craftconomy3 v3.1.1 b1020-9421dfd90af27033ed0a54d2373491f2c54fa8f7-master
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServer.java:514)
	at net.minecraft.server.v1_4_R1.PlayerConnection.handleCommand(PlayerConnection.java:980)
	at net.minecraft.server.v1_4_R1.PlayerConnection.chat(PlayerConnection.java:898)
	at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:853)
	at net.minecraft.server.v1_4_R1.Packet3Chat.handle(Packet3Chat.java:44)
	at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
	at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:113)
	at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
	at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598)
	at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
	at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
	at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NullPointerException
	at java.util.regex.Matcher.getTextLength(Matcher.java:1234)
	at java.util.regex.Matcher.reset(Matcher.java:308)
	at java.util.regex.Matcher.<init>(Matcher.java:228)
	at java.util.regex.Pattern.matcher(Pattern.java:1088)
	at java.util.Formatter.parse(Formatter.java:2515)
	at java.util.Formatter.format(Formatter.java:2469)
	at java.util.Formatter.format(Formatter.java:2423)
	at java.lang.String.format(String.java:2845)
	at com.greatmancode.craftconomy3.commands.group.GroupAddWorldCommand.execute(GroupAddWorldCommand.java:30)
	at com.greatmancode.craftconomy3.commands.CommandHandler.execute(CommandHandler.java:65)
	at com.greatmancode.craftconomy3.commands.managers.BukkitCommandManager.onCommand(BukkitCommandManager.java:45)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
	... 15 more
2013-02-25 09:10:41 [INFO] Couga issued server command: /ccgroup create Nem
2013-02-25 09:13:19 [INFO] Couga issued server command: /ccgroup addworld Nem Nemland
2013-02-25 09:13:19 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'ccgroup' in plugin Craftconomy3 v3.1.1 b1020-9421dfd90af27033ed0a54d2373491f2c54fa8f7-master
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServer.java:514)
	at net.minecraft.server.v1_4_R1.PlayerConnection.handleCommand(PlayerConnection.java:980)
	at net.minecraft.server.v1_4_R1.PlayerConnection.chat(PlayerConnection.java:898)
	at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:853)
	at net.minecraft.server.v1_4_R1.Packet3Chat.handle(Packet3Chat.java:44)
	at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
	at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:113)
	at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
	at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598)
	at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
	at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
	at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NullPointerException
	at java.util.regex.Matcher.getTextLength(Matcher.java:1234)
	at java.util.regex.Matcher.reset(Matcher.java:308)
	at java.util.regex.Matcher.<init>(Matcher.java:228)
	at java.util.regex.Pattern.matcher(Pattern.java:1088)
	at java.util.Formatter.parse(Formatter.java:2515)
	at java.util.Formatter.format(Formatter.java:2469)
	at java.util.Formatter.format(Formatter.java:2423)
	at java.lang.String.format(String.java:2845)
	at com.greatmancode.craftconomy3.commands.group.GroupAddWorldCommand.execute(GroupAddWorldCommand.java:30)
	at com.greatmancode.craftconomy3.commands.CommandHandler.execute(CommandHandler.java:65)
	at com.greatmancode.craftconomy3.commands.managers.BukkitCommandManager.onCommand(BukkitCommandManager.java:45)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
	... 15 more