Error during FFT analyzer is Simulink

On this picture you can see my simulink circuit and the error I get when i try to run the FFT analyzer through the powergui. I have already unticked the "Single simulation output" in the "Configuration parameters", and saved the data in workspace.

What does this error message mean? I am running on Matlab R2024a.

[Gayathri]

@Åsmund Can you please provide your Simulink file so that I get a deeper understanding of the model.

Answer 1

[Pramil]

Hi Asmund,

I have faced a similar issue while using MATLAB R2024a. The issue seems to stem from the output variable being of type "Dataset".

What worked for me was to run the model and then convert the output variables into type "struct".

You can use the following code to do the same:

function newlogsout = Dataset2Struct(logsout)
    newlogsout.time = logsout.getElement(1).Values.Time;
    newlogsout.blockName = logsout.getElement(1).BlockPath.getBlock(1);
    for i=1:logsout.numElements
        newlogsout.signals(i).values = logsout.getElement(i).Values.Data;
        newlogsout.signals(i).label = logsout.getElement(i).Values.Name;
        newlogsout.signals(i).dimensions = 1;
    end
end

After this, you can select the struct variables within "FFT Analyzer" and it should work just fine.

Hope it helps.