ERROR : cannot identify

asked 2017-01-25 07:14:54 -0600

sophie.shin gravatar image

updated 2017-01-25 08:00:50 -0600

gvdhoorn gravatar image

Hello. I input 'roslaunch elp_stereo_camera elp_stereo_camera.launch' and I got an error as below.

ubuntu@ubuntu:~$ roslaunch elp_stereo_camera elp_stereo_camera.launch
... logging to /home/ubuntu/.ros/log/7b619c30-e2fe-11e6-9f1e-0022cffa2d4b/roslaunch-ubuntu-4255.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://ubuntu:41191/



 * /elp/left/camera_frame_id: elp_left_optical_...
 * /elp/left/camera_info_url: package://elp_ste...
 * /elp/left/camera_name: elp_left
 * /elp/left/framerate: 15
 * /elp/left/image_height: 720
 * /elp/left/image_width: 1280
 * /elp/left/pixel_format: mjpeg
 * /elp/left/video_device: /dev/elp_left
 * /elp/right/camera_frame_id: elp_right_optical...
 * /elp/right/camera_info_url: package://elp_ste...
 * /elp/right/camera_name: elp_right
 * /elp/right/framerate: 15
 * /elp/right/image_height: 720
 * /elp/right/image_width: 1280
 * /elp/right/pixel_format: mjpeg
 * /elp/right/video_device: /dev/elp_right
 * /rosdistro: indigo
 * /rosversion: 1.11.20


    left (usb_cam/usb_cam_node)
    right (usb_cam/usb_cam_node)


core service [/rosout] found
process[elp/left-1]: started with pid [4273]
process[elp/right-2]: started with pid [4274]

[ERROR] [1485349340.027221093]: Cannot identify '/dev/elp_left': 2, No such file or directory
[elp/left-1] process has died [pid 4273, exit code 1, cmd /opt/ros/indigo/lib/usb_cam/usb_cam_node __name:=left __log:=/home/ubuntu/.ros/log/7b619c30-e2fe-11e6-9f1e-0022cffa2d4b/elp-left-1.log].
log file: /home/ubuntu/.ros/log/7b619c30-e2fe-11e6-9f1e-0022cffa2d4b/elp-left-1*.log

[elp/left-1] restarting process

Please help me..

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Could I ask you to please format console copy/pastes nex ttime using the Preformatted Text button (the one with 101010 on it)? That makes things much easier to read. Just select the text, press the button, or use ctrl+k.


gvdhoorn gravatar image gvdhoorn  ( 2017-01-25 08:01:39 -0600 )edit

Thank you so much for your comments! I didn't know how to do that..! I learned one thing from you!

sophie.shin gravatar image sophie.shin  ( 2017-01-25 08:13:45 -0600 )edit