2013-04-16 20:11:01 [SEVERE] org.bukkit.command.CommandException: Unhandled exception executing command 'exec' in plugin bPermissions v2.10.6
2013-04-16 20:11:01 [SEVERE] 	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
2013-04-16 20:11:01 [SEVERE] 	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:189)
2013-04-16 20:11:01 [SEVERE] 	at org.bukkit.craftbukkit.v1_5_R2.CraftServer.dispatchCommand(CraftServer.java:546)
2013-04-16 20:11:01 [SEVERE] 	at net.buycraft.tasks.PackageCheckerTask.executeCommand(PackageCheckerTask.java:140)
2013-04-16 20:11:01 [SEVERE] 	at net.buycraft.tasks.PackageCheckerTask.run(PackageCheckerTask.java:67)
2013-04-16 20:11:01 [SEVERE] 	at org.bukkit.craftbukkit.v1_5_R2.scheduler.CraftTask.run(CraftTask.java:58)
2013-04-16 20:11:01 [SEVERE] 	at org.bukkit.craftbukkit.v1_5_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
2013-04-16 20:11:01 [SEVERE] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
2013-04-16 20:11:01 [SEVERE] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
2013-04-16 20:11:01 [SEVERE] 	at java.lang.Thread.run(Unknown Source)
2013-04-16 20:11:01 [SEVERE] Caused by: java.util.ConcurrentModificationException
2013-04-16 20:11:01 [SEVERE] 	at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
2013-04-16 20:11:01 [SEVERE] 	at java.util.HashMap$ValueIterator.next(Unknown Source)
2013-04-16 20:11:01 [SEVERE] 	at java.util.AbstractCollection.addAll(Unknown Source)
2013-04-16 20:11:01 [SEVERE] 	at java.util.HashSet.<init>(Unknown Source)
2013-04-16 20:11:01 [SEVERE] 	at org.bukkit.permissions.PermissibleBase.getEffectivePermissions(PermissibleBase.java:232)
2013-04-16 20:11:01 [SEVERE] 	at org.bukkit.craftbukkit.v1_5_R2.entity.CraftHumanEntity.getEffectivePermissions(CraftHumanEntity.java:148)
2013-04-16 20:11:01 [SEVERE] 	at de.bananaco.bpermissions.imp.HandlePermissions.removePermissions(HandlePermissions.java:20)
2013-04-16 20:11:01 [SEVERE] 	at de.bananaco.bpermissions.imp.SuperPermissionHandler.setupPlayer(SuperPermissionHandler.java:91)
2013-04-16 20:11:01 [SEVERE] 	at de.bananaco.bpermissions.imp.SuperPermissionHandler.setupPlayer(SuperPermissionHandler.java:176)
2013-04-16 20:11:01 [SEVERE] 	at de.bananaco.bpermissions.imp.YamlWorld.setupPlayer(YamlWorld.java:321)
2013-04-16 20:11:01 [SEVERE] 	at de.bananaco.bpermissions.imp.YamlWorld.setupAll(YamlWorld.java:308)
2013-04-16 20:11:01 [SEVERE] 	at de.bananaco.bpermissions.api.CalculableWrapper.addGroup(CalculableWrapper.java:36)
2013-04-16 20:11:01 [SEVERE] 	at de.bananaco.bpermissions.imp.ExtraCommands.execute(ExtraCommands.java:34)
2013-04-16 20:11:01 [SEVERE] 	at de.bananaco.bpermissions.imp.Permissions.onCommand(Permissions.java:395)
2013-04-16 20:11:01 [SEVERE] 	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
2013-04-16 20:11:01 [SEVERE] 	... 9 more