3.3 controller not found

[MustaphaJames]

I am getting this error when I try to get the controller.
I have tried the solution of:
sudo apt update
sudo apt install ros-humble-rqt-joint-trajectory-controller

however I get the error above the not found message

does anyone know how this can be resolved?

[ralves]

Hi @MustaphaJames,

thanks for reporting the error. I just tested it and confirmed the error is there.

You can install it with the following commands, until we install it in the course environment:

sudo apt-get update

sudo apt-get install -y ros-humble-rqt-joint-trajectory-controller

After that, the command mentioned in the instructions should work nicely:

ros2 run rqt_joint_trajectory_controller rqt_joint_trajectory_controller

Please let us know if you find any other issues.

[MustaphaJames]

the error remains the same:

[ralves]

Hi @MustaphaJames

Are you sure you ran the two commands below?

The first command, to update the APT sources:

sudo apt-get update

And the second command to actually install the package needed?

sudo apt-get install -y ros-humble-rqt-joint-trajectory-controller

And only then try to run the program?

 ros2 run rqt_joint_trajectory_controller rqt_joint_trajectory_controller

[MustaphaJames]

Hello,
thanks it now works but when I switch the green button on the controller it immediately aborts and gives this message:

[albertoezquerro]

Hello @MustaphaJames ,

Can you try restarting the simulation? That might fix the issue. From my experience, I’ve found that rqt_joint_trajectory_controller is quite buggy.

Best,