problem with roslaunch command and Kinect camera_info [closed]

edit

We are using Kinect connected to usb 2.0 port as required and diamondback ROS. Does Kinect need calibration?

We tried

rostopic echo /camera/depth/points

and this is publishing data.

but we tried the roslaunch command and it doesn't start the device but gives an error. we also used

rostopic echo /camera/rgb/camera_info

But this does not publish any data and due to that rviz gives an error on opening.

If it requires calibration, we found, in openni_node.launch this line:

`<rosparam command="load" file="$(file openni_camera)/info/openni_params.yaml"/>.`

Calibration parameters are present in openni_params.yaml that is used in openni_node.launch. Also found some other files in info folder. But still it does not access camera info.