stacktrace

2013-08-16 15:25:23 [WARNING] Unexpected exception while parsing console command "exec u: ahellhound a:setgroup v:vip2"
org.bukkit.command.CommandException: Unhandled exception executing command 'exec' in plugin bPermissions v2.11.5
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:192)
	at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchCommand(CraftServer.java:527)
	at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchServerCommand(CraftServer.java:516)
	at net.minecraft.server.v1_6_R2.DedicatedServer.ar(DedicatedServer.java:275)
	at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:240)
	at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:481)
	at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:413)
	at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
	at de.bananaco.bpermissions.imp.Permissions.onCommand(Permissions.java:392)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
	... 8 more
2013-08-16 15:26:44 [INFO] Executing action: setgroup vip2 in all worlds
2013-08-16 15:26:44 [INFO] Action applied to user ahellhound
2013-08-16 15:27:10 [INFO] Executing action: setgroup vip2 in all worlds
2013-08-16 15:27:10 [INFO] Action applied to user ahellhound
2013-08-16 15:27:16 [INFO] <[Supporter]AhellHound> t