Hi, you can check this manual https://www.ee.columbia.edu/~marios/matlab/MatlabStyle1p5.pdf . It was very useful for me, when I started oop in MATLAB. Also you should check ALL file paths in your application. I prefer to write some function like attached, that configures all file paths before execution.
function config_paths
rootDir = fileparts(which('config_paths'));
path2add{1} = rootDir;
path2add{2} = [rootDir,'folder_1'];
path2add{3} = [rootDir,'folder_2'];
% etc
end
