How to solve "Parse error at METHODS: usage might be invalid MATLAB syntax."? (MATLAB 2017b)

Good day all.

I have an issue on running an application in App Designer as when I tried to simulate the designed app, the error occured:

Error using DRS
Error: File: DRS.mlapp Line: 94 Column: 5
Illegal use of reserved keyword "methods".

And when I put cursor on methods and it shows:

"Parse error at METHODS: usage might be invalid MATLAB syntax"

This problem occured when I tried to link the selections in drop-down menu to another three panels that have connection between it.

The code that I used is shown below:

% Value changed function: DropDown  
function DropDownValueChanged(app, event)
value = app.DropDown.Value;
% Hide all the panels
    app.PanelA.Visible = 'off';
        app.PanelB.Visible = 'off';
        app.PanelC.Visible = 'off';
      
%If Panel A is selected, show panel 1
        if strcmp(value,'Panel A')
            app.PanelA.Visible = 'on';
        elseif strcmp(value,'Panel B')
            app.PanelB.Visible = 'on';
        elseif strcmp(value,'Panel C')
            app.PanelC.Visible = 'on';
end 
end

I have lost the direction, which part that I actually did wrong? May I ask the opinion from the community?

Thank you in advanced.

Answer 1

[Harsha Priya Daggubati]

Hi,

The error might pop-up due to no matching end for the method block created by you in the App Designer Code. You also can’t create one method block inside another method block. I suggest you to search your code for any such cases.

Hope this helps!

Answer 2

[Li Mun Ng]

Dear Harsha,

Thank you for your solution and I found out that the parse error was due to the reason I did not put an "End" to close the loop. That's why it was unable to run the app. Thank you once again and I appreciate that.