I'm tryin to launch the minimal.launch file in turtlebot_bringup folder but i keep getting the following error:

unused args [rapppreferredconfigurationfile, capabilitiespackagewhitelist, interactions, capabilitiesblacklist, screen, autorappinstallation, rapppackagewhitelist, capabilities, interactionslist, zeroconf, robotdescription, capabilitiesnodeletmanagername, capabilitiesparameters, autostartrapp, zeroconfname, rapppackageblacklist, capabilitiesservername, zeroconfport] for include of [/opt/ros/hydro/share/roconappmanager/launch/standalone.launch]

I'm using UBuntu 12.04 & ROS Hydro.