error the class raspi has no constant property or static method named 'internal in matlab

This error message could occur due to using an outdated version of MATLAB Support Package for Raspberry Pi Hardware. To resolve this issue, you can try updating the MATLAB Support Package for Raspberry Pi Hardware by following these steps:

1. Open MATLAB
2. Go to the menu "Home -> Add-Ons -> Manage Add-Ons"
3. On the left pane, select "Hardware Support"
4. Find "MATLAB Support Package for Raspberry Pi Hardware" and click on it
5. If an update is available, click on "Update"

If the error persists after updating the support package, you can try to add the missing static method by adding the following code at the beginning of your script:

main.m
if ~exist('internal', 'class')
    classdef internal
        methods(Static)
            function ret = constant(varargin)
                ret = 0;
            end
        end
    end
end
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This will define a dummy internal class with a static constant method that returns 0. Please note that this is just a workaround and it may not resolve the underlying issue causing the error message.