ros2node() freezes execution

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Hendrik Steidl
Hendrik Steidl on 13 Apr 2022
I'm trying to implement and run a ROS2 node in Matlab.
Yesterday, when I first used the Matlab ROS Toolbox, everything worked seamlessly.
Today, after a reboot of my device (Windows 10, 21H2), the simple node creation command
node = ros2node("name");
causes the execution to freeze infinitely until I manually kill the process libmwros2server.
Running and connecting any other ROS2 nodes outside of Matlab is working without any trouble.
I don't receive any errors or any feedback at all. I've tried rebooting my device multiple times and reinstalled Matlab with all toolboxes but without success.
I would appreciate any help on this one.
Kenneth De Leener
Kenneth De Leener on 10 Jun 2022
Hi everyone,
I ran into the same issue, attached rossupport.txt.
Some additional info:
  • If I run a ros2 command like ros2 node list, followed by the creation of a ros2node, the ROS daemon locks up
  • If you first run ros2node, it works fine, after the creation of a second node, it locks up again.
Thank you Hendrik for the work around, this was crucial for our project.

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Answers (1)

Jagadeesh Konakalla
Jagadeesh Konakalla on 12 Oct 2022
It is observed that with FastDDS as RMW middlwware, the domain ID 0 does not work on few machines. The workaround for now is to use the Domain ID other that 0 or use change the RMW middlwware to other middleware.
Please see the following link on how to switch to different middlwares in MATLAB/Simulink.
Jagadeesh K.




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