Simulink ROS2 subscriber transport stopped

Hello,

I am trying to subscribe to a ros2 topic, but I get the following error:

STD exception 'mwboost::wrapexcept<std::runtime_error>': 'Transport stopped.' was caught.

My Simulink model is the same as the example given in the tutorial, except I changed the subscriber topic to /controller_output to match my code.Inside the subsystem block at the bottom of my screenshot, I changed the bus assignment from the tutorial from x,y to torque, delta according to my message definition.

In my Linux terminal, I can see the messages being posted by using ros2 topic echo /controller_output

ROS2 subscriber block with sample time 0.01, topic /controller_output, message /custom_msgs/ControllerCommand

QoS: Reliable and Volatile

My setup:

Ubuntu 20.04

Matlab R2022b

ROS2 Humble

My message definition in ControllerCommand.msg

float64 torque

float64 delta

[Prabeen Sahu]

Hello Renzo,

Please restart the model and see if the issue still exists.

I need some more information to help you on this issue.

• Does the original example work fine in your PC ?
• Do you see this issue only with custom_msgs/ControllerCommand message or with other standard messages also ? Instead of custom_msgs/ControllerCommand please publish standard messages(geometry_msgs/Point) from "Ubuntu 20.04 ROS2 Humble" to a different topic(/location1). Please change the subscriber topic to /location1 and change the bus assignment to x,y in the Simulink model. Please run the model with these changes and check if this works.
• Please also attach the support file generated by the command ros.internal.generateSupportFile

- Prabeen