Unable to attach add_exec_event_listener to a block when using Simulink Compiler

I am trying to get real-time data from simulink model (rtl-sdr receiver) and display it on gui, so I am using `add_exec_event_listener` in Simulink model callback as written here: https://www.mathworks.com/matlabcentral/answers/446302-how-do-i-update-a-gui-designed-in-app-designer-with-data-from-a-running-simulink-model

Interaction with model based on Simulink Compiler functions, e.g. creation a SimulationInput object and simulink.compiler.configureForDeployment.

The problem is that I get an error when the line below is executed:

out=sim(in)

Full text of an error:

Error evaluating 'StartFcn' callback of block_diagram 'gsmAdGui2'.

Callback string is 'blk = 'gsmAdGui2/Gain';

event = 'PostOutputs';

listener = @(app, event) updateGUI(hApp);

h = add_exec_event_listener(blk, event, listener);

Caused by:

Error using Simulink.Simulation.internal.DesktopSimHelper

Adding a listener for a block method execution event for 'gsmAdGui2/Gain' is not supported. Listeners can be added only when block diagram is executing.

I don't understand what should I do to correctly attach the listener to a gain block (because it cannot be attached directly to a rtl-sdr). Thank for any help.

Here is main callback function:

function StartButtonPushed(app, event)

app.StartButton.Enable = 'off';

app.StopButton.Enable = 'on';

app.SamplingRate=app.SampRateEditField.Value;

%Create a SimulationInput object for this model

in=Simulink.SimulationInput(app.modelName);

in=in.setModelParameter('StartTime','0.01','StopTime', num2str(app.StopTimeEditField.Value));

in = in.setVariable('sdrGain', app.GainEditField.Value);

in = in.setVariable('fc', app.CenterFreqEditField.Value);

in = in.setVariable('sampRate', app.SamplingRate);

in.applyToModel;

in=simulink.compiler.configureForDeployment(in);

out=sim(in);%запуск симуляции

app.StartButton.Enable = 'on';

app.StopButton.Enable = 'off';

end

Here is updateGUI function that receives real-time data from model:

function updateGUI(app, varargin) %plots fft of received 2048 samples per frame iq stream

% Create an object that gets the run-time value of the specified block

rto = get_param([bdroot,'/Gain'],'RuntimeObject');

% Update the GUI accordingly

currentTime = rto.CurrentTime;

app.SimTime.Text = num2str(currentTime);

sdrData = rto.InputPort(1).Data;

sdrData=sdrData.*app.W; % hamming window

sdrFft = fftshift(fft(sdrData));

sdrFft=20*log10((abs(sdrFft))/2048);

plot(app.UIAxes, app.freqvec, sdrFft,'b');

end

Here is model InitFcn: hApp = sdrAdGui8 %name of an app

Here is model StartFcn:

blk = 'gsmAdGui2/Gain'; %block to listen

event = 'PostOutputs';

listener = @(app, event) updateGUI(hApp);

h = add_exec_event_listener(blk, event, listener);

[Fabian]

Hello together, is this question answered yet? I have the same issue.

[alex alex]

Hello, no. I dropped this project :)