Question
My Simulink model contains a mask with the following initialization code: plot test_var=1 When this code executes after changing a dialog parameter in the mask, the plot command should cause an error, however, no error message is displayed in the MATLAB command window. I tried using the following command to debug code execution: dbstop if error However, this did not work.
Expert Answer
Prashant Kumar
PhD Expert
Answered Aug 17, 2026
he ability to debug mask initialization code is not available in Simulink. A mask's initialization code will run when a dialog parameter is changed. However, when an error is encountered during this execution, no warning is displayed to the user.
To work around this issue, you can place the entire mask initialization code in a try-catch statement in order to display a warning, as demonstrated in the following code:
try
plot
test_var=1
catch
disp('Failed mask initialization')
end
If you would like to debug the initialization code, you can place the mask initialization code in a MATLAB file function and debug the code from there.
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