Simulink Desktop Real-Time issue under Matlab R2024a

I am trying to run SLDRT models with Matlab/Simulink R2024a.

The models were functionnal under Matlab R2023a

In Matlab/Simulink R2024a, the analog inputs of my NI-PCI 6321 card update at a very slow pace and the analog outputs never update.

To ensure that this is not a Windows 11 issue, I reverted back to Matlab/Simulink R2023a and the old models still worked fine.

Is there a real issue or am I missing something?

[Swastik Sarkar]

Hi @Jean-Jacques,

It is advisable to review the changes between R2023b and R2024a. The release notes can be accessed here: https://www.mathworks.com/help/sldrt/release-notes.html?startrelease=R2023b&endrelease=R2024a&rntext=&groupby=release&sortby=descending

There is a particular update in R2024a that may impact the board. It would be beneficial to check if the specific feature affected is in use.

[Swastik Sarkar]

Could the model be shared for testing and to explore potential workarounds?

[Jean-Jacques]

Thanks for the offer.

The case has been solved by MathWorks technical support.

[Swastik Sarkar]

@Jean-Jacques, Will it be possible to mention the solution here so that other people facing similar issue can refer to this ?

Answer 1

[Jean-Jacques]

The problem was identified by Matlab tech support as "[...] a bug in the Slider Gain block on MATLAB R2024a. This bug pertains particularly to the slider widget in the block's mask dialog."

The solution : "This bug has been fixed in our newest release, R2024b. [...] I would recommend you download and install MATLAB R2024b [...]."

I haven't try this solution yet but will do in the next few weeks.