[ INFO] [1503179832.315388701]: Loaded gazebo_ros_control. [ERROR] [1503179832.588120998]: Could not load controller 'left_wheel_effort_controller' because controller type 'effort_controllers/JointEffortController' does not exist. [ERROR] [1503179832.588187674]: Use 'rosservice call controller_manager/list_controller_types' to get the available types [ERROR] [WallTime: 1503179833.588903] Failed to load left_wheel_effort_controller [ERROR] [1503179833.592566504]: Could not load controller 'right_wheel_effort_controller' because controller type 'effort_controllers/JointEffortController' does not exist. [ERROR] [1503179833.592649534]: Use 'rosservice call controller_manager/list_controller_types' to get the available types [ERROR] [WallTime: 1503179834.593334] Failed to load right_wheel_effort_controller [ERROR] [1503179834.596893799]: Could not load controller 'left_steer_position_controller' because controller type 'effort_controllers/JointPositionController' does not exist. [ERROR] [1503179834.596972327]: Use 'rosservice call controller_manager/list_controller_types' to get the available types [ERROR] [WallTime: 1503179835.597386] Failed to load left_steer_position_controller [ERROR] [1503179835.601183785]: Could not load controller 'right_steer_position_controller' because controller type 'effort_controllers/JointPositionController' does not exist. [ERROR] [1503179835.601343634]: Use 'rosservice call controller_manager/list_controller_types' to get the available types [ERROR] [WallTime: 1503179836.602396] Failed to load right_steer_position_controller [ERROR] [1503179836.606022583]: Could not load controller 'joint_state_controller' because controller type 'joint_state_controller/JointStateController' does not exist. [ERROR] [1503179836.606098935]: Use 'rosservice call controller_manager/list_controller_types' to get the available types [ERROR] [WallTime: 1503179837.606654] Failed to load joint_state_controller