STD Exception ROS2 Custom Message Simulink

I would appreciate ant tips regarding the following. :)

MATLAB R2021A

Error in Simulink Diagnostic Viewer: Subscribing to a topic with a custom message.

STD exception 'class mwboost::exception_detail::clone_impl': 'Connection to process with Exchange: "f945d322-3833-4611-89f7-e4b72eeb8dd3 " was lost.' was caught.

On a seperate machine the following is running:

custom message: custom_interfaces/HldLldDrivingControllerSpeed.msg

Succesful custom message generation:

[Hassan Hotait]

I just noticed connectivity test fails

but how come I can see the topics on the other machine?

[Jagadeesh Konakalla]

Hi Hasaan,

Are you using ROS1 or ROS2 ?

ROS2 does not require rosinit. the rosinit is for connecting to ROS1 Master.

In case of ROS2, you need to make sure that Domain ID is same. I guess in your case, the Domain ID of VM and MATLAB is same. That is why you see ros2 topic list working.

Can you provide clear reproduction steps

Thanks,

Jagadeesh K,

[Hassan Hotait]

Okay I see. I am usin ROS2.

What are reproduction steps?

[Jagadeesh Konakalla]

Hi Hassan,

I mean, i mean steps to reproduce the error that you are seeing. Please share the model and custom messages.

I will try on my end and let you know.

Thanks,

Jagadeesh K

[Hassan Hotait]

Hi Jagadeesh,

I just tried it again and it worked. Thanks anyways.

Consider the case closed.

[준기 홍]

Hi Hassan Hotait, its nice to hear you have solved it.

im facing the similar issue you have posted. i made a custom message using "ros2genmsg()" and when i run the simulink model i get a error message saying

STD exception 'mwboost::wrapexcept<mwboost::exception_detail::current_exception_std_exception_wrapper<std::invalid_argument> >': 'Connection to process with Exchange: "5f1470ff-8f66-40e9-84fb-5f3bfd116a13 " was lost.' was caught.

it would be thankful of you if you can share how you made it work.

Answer 1

[Jagadeesh Konakalla]

Looks like restarting the MATLAB solved the problem.

[Nupur]

I came across the same error and restrating the MATLAB didn't solve the problem. I then reset the publisher and subscriber block and it solved the error.

[Jagadeesh Konakalla]

Hi Nupur,

How did you Rest the publisher and subscriber block ?

Jagadeesh K.

[Nupur]

Hi Jagadeesh,

What I meant by reseting publisher & subscriber block is by reloading the topic in the blocks.