Hi, I think there's a small misleading mistake in robot_model/urdf/src/model.cpp : line 83: ROS_ERROR("Could read parameter %s on parameter server", full_param.c_str()); should be: ROS_ERROR("Could not read parameter %s on parameter server", full_param.c_str()); Cheers, Ugo -- Ugo Cupcic | Shadow Robot Company | ugo@shadowrobot.com Software Engineer | 251 Liverpool Road | need a Hand? | London N1 1LX | +44 20 7700 2487 http://www.shadowrobot.com/hand/ @shadowrobot