Error using cd, Cannot CD

When I tried to run the following code in my matlab, it said" Error using cd, Cannot CD to( Name is nonexistent or not a directory), could you tell me why this happens, thank you very much!

if(~isdeployed)
  cd(fileparts(which(mfilename)));
end

Answer 1

[the cyclist]

This code works for me when mfilename is a file that exists in my path, but otherwise it gives that error. So, my guess is that you have an error in what is stored in mfilename.