What is going on here? almost nothing runs from the terminal

General Support
1

I am just trying to run very basic tools and this is what I am getting.
Some “XDG_RUNTIME_DIR” error…
constructapp

Please advise.

Thank you

2

You need to provide more context about what were you doing.

Always indicate as much information as possible. For instance:

  • What were you doing? Launching a course of a rosject?
  • Which course? Which rosject?
  • Take a picture of the whole screen not only of the few lines that show the error. Usually the error is due to some things done before.
  • Take a picture of the whole screen, not only of the terminal
  • Include information about your system (which OS, which browser, which location)
3

Many thanks for your reply,
This is all taking place on a rosjet on the construct’s app (web app).
I am using humble hawksbill here.
Right off the bat, I was trying to run rqt_graph. I never had any prior issues with the app.
I think that this has to do with backend of the app.
This also occurs with any other command where some window is expected to open up (e.g. turtle simulator).

Untitled
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4

Thanks for sharing the screenshot.

Now from the screenshot, it’s normal that rqt_graph does not work because no simulation is running.

Are you familiar with the basics of ROS / ROS 2? If not, I would recommend that you take the ROS Basics in 5 Days / ROS2 Basics in 5 Days course, depending on which version you wish to learn.

If you are following a copied rosject (with a detailed notebook), it should have instructions about launching the simulation before running visualization packages.

5

rqt_graph is supposed to show the running nodes and topics…
Kindly, take a closer look at the message in blue in the original post.

Also, when attempting to run turtlesim_node, I get the same error.
Take a look here:

test1scrn
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6

Oh, I see. The images you shared earlier did not indicate that you ran any simulation.

I assume you left the simulation running in one terminal and ran the rqt_graph in another terminal?

Also, the “XDG_RUNTIME_DIR” error message is just a greeting message to get used to :wink:

Please open the Graphical Tools window to see both the sim and the visualization:

rviz-graphical-tools
rviz-graphical-tools1914×963 102 KB

7

Thank you Bayodesegun,

The issue has been resolved.
Earlier, I was able to view rqt_graph and similar applications right after pressing the enter button (after typing the command in the terminal). However, now, I can only view these application windows after clicking on the “graphical tools” window button.

Best,

8

Thanks for the update.

Glad to inform you that the windows now automatically open as before so you would not have to manually open them.