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I recently learned about the roswtf tool and have been trying to use it to determine where some things are going wrong. When I use roswtf after launching my Kinects in separate terminals like so:

roslaunch openni_launch openni.launch camera:=kinect_1 device_id:=1@0 
roslaunch openni_launch openni.launch camera:=kinect_2 device_id:=2@0 
roslaunch openni_launch openni.launch camera:=kinect_3 device_id:=3@0 

I receive this error:

WARNING The following node subscriptions are unconnected:
 * /kinect_2/kinect_2_nodelet_manager:
   * /tf_static
 * /kinect_1/kinect_1_nodelet_manager:
   * /tf_static
 * /kinect_3/kinect_3_nodelet_manager:
   * /tf_static

Is this anything to be concerned about? I can access all of my camera streams still- rbg, disparity, and depth. What exactly does this error mean? I've tried googling and looking on here and haven't seen this error. I'm using model #1473 Kinects and Hydro.

And to add to my confusion, this is the rqt_graph: http://imgur.com/uFdxehH (I can't insert the picture it's too big)

It looks like they're connected to me.


Originally posted by Athoesen on ROS Answers with karma: 429 on 2014-01-07

Post score: 1


Original comments

Comment by sophye_turtlebot on 2015-04-02:
hi

me too, i have problem with tf_static and When I use roswtf, i find this warnings: WARNING The following node subscriptions are unconnected:

  • /camera/camera_nodelet_manager:
    • /tf_static
  • /octomap_server:
    • /tf_static /rgbdslam:
    • /tf_static

Comment by sophye_turtlebot on 2015-04-02:
did you find any solution?

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1 Answer 1

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This is old, but I just had to find that out too.

Most probably, you are using a TransformListener. The reason tf_static is reported as unconnected is that it automatically subscribes to both tf and tf_static (see source). Now if you only use tf in your system (which is perfectly legal afaik), tf_static will not be connected.


Originally posted by cellard0or with karma: 61 on 2016-06-10

This answer was ACCEPTED on the original site

Post score: 2


Original comments

Comment by 130s on 2018-05-31:
+1. Btw, I found this warning confusing, so filed a ticket.

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