How do I debug mask initialization code in Simulink?

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.

Answer 1

[MathWorks Support Team]

The 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.