dispatchCommand wipes permissions group.yml

Following code executed wipes out `group.yml` file (it leaves groups, just all are blank absent permission nodes). Why's that?

Code:

Bukkit.getServer().dispatchCommand(player.getServer().getConsoleSender(), "exec u:" + playerName.toLowerCase() + " a:addperm v:worldguard.region.addowner.own.*");
Bukkit.getServer().dispatchCommand(player.getServer().getConsoleSender(), "permissions save");
Bukkit.getServer().dispatchCommand(player.getServer().getConsoleSender(), "permissions reload");
 
Bukkit.getServer().dispatchCommand(player.getServer().getConsoleSender(), "exec u:" + playerName.toLowerCase() + " a:rmperm v:worldguard.region.addowner.own.*");
Bukkit.getServer().dispatchCommand(player.getServer().getConsoleSender(), "permissions save");
Bukkit.getServer().dispatchCommand(player.getServer().getConsoleSender(), "permissions reload");

 

Plugin Development http://forums.bukkit.org/forums/plugin-development.5/ is probably a better place.

Also, questions that come to mind:
1. What permissions plugin is that?
2. Why not hook directly into the permissions plugin instead of dispatching commands?

 

It's bPermissions