I am writing a code where i used melcepsta function and it worked fine for the first time. Later I closed Matlab completely and opened it 3 days later to run the same program, but it did not run and it gave me this error.. "Undefined function 'Melcepsta'". Before running the program after 3 days it asked whether to change the path of the .m file or add to the path.. I selected add to the path.. I have attached the .m and .fig file along. Please, any help will be appreciated.