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No motors found!

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I am not able to overcome this error for sometime now. There are similar questions but none of them have been able to solve my problem of "No motors found". Here's the error message that ROS gives when I launch the `controller_manager.launch` file. PARAMETERS * /dynamixel_manager/namespace: dxl_manager * /dynamixel_manager/serial_ports/pan_tilt_port/baud_rate: 1000000 * /dynamixel_manager/serial_ports/pan_tilt_port/max_motor_id: 8 * /dynamixel_manager/serial_ports/pan_tilt_port/min_motor_id: 1 * /dynamixel_manager/serial_ports/pan_tilt_port/port_name: /dev/ttyUSB0 * /dynamixel_manager/serial_ports/pan_tilt_port/update_rate: 20 * /rosdistro: indigo * /rosversion: 1.11.13 NODES / dynamixel_manager (dynamixel_controllers/controller_manager.py) ROS_MASTER_URI=http://localhost:11311 core service [/rosout] found process[dynamixel_manager-1]: started with pid [5276] [INFO] [WallTime: 1438486858.620549] pan_tilt_port: Pinging motor IDs 1 through 8... [FATAL] [WallTime: 1438486859.290363] pan_tilt_port: No motors found. ================================================================================REQUIRED process [dynamixel_manager-1] has died! process has died [pid 5276, exit code 1, cmd /home/ankit/catkin_ws/src/dynamixe I followed [dynamixel_controllers/Tutorials/ConnectingToDynamixelBus](http://wiki.ros.org/dynamixel_controllers/Tutorials/ConnectingToDynamixelBus) tutorial to create the package and the launch file. I have also setup my motor IDs using the Dynamanager software by Trossen Robotics. I've set the baudrate to 1000000 as recommended. The interesting thing is that I can see my motors when I use `arbotix_python` (`arbotix_driver` & `arbotix_terminal`) nodes with the `ls` command. Please can anybody help ?

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