Should <matlabroo​t>\toolbox​\matlab\co​detools\ja​\ be in the search path? Solved!

When I started R2013a today, 446 warnings like this one were displayed.

    Warning: Function C:\Program Files\MATLAB\R2013a\toolbox\matlab\codetools
    \ja\dbclear.m has the same name as a MATLAB builtin. We suggest you rename the
    function to avoid a potential name conflict.

I have never seen anything like this before. ...\ja\dbclear.m seems to be a help-file with "strange" encoding.

...\toolbox\matlab\codetools\ja\ is in the Matlab search path

    >> which dbclear -all
    built-in (C:\Program Files\MATLAB\R2013a\toolbox\matlab\codetools\dbclear)
    C:\Program Files\MATLAB\R2013a\toolbox\matlab\codetools\ja\dbclear.m   % Shadowed 
    >>

Question:

• Should C:\Program Files\MATLAB\R2013a\toolbox\matlab\codetools\ja\ be the in Matlab search path?
• If so, what is going on?

Answer 1

[per isakson]

Solution ID: 1-8T166L answers my first question; the folders in question should not be in the path. (Tech-support helped me find that answer.) I cannot figure out how the folders were added to the search path.

I removed the folders from the search path with the function, remove_paths_Solution_ID_1_8T166L (attached below). Steps:

• copy all the warning messages to a text file, e.g. named name_conflict.txt
• run remove_paths_Solution_ID_1_8T166L(fullfile(folderspec,name_conflict.txt)). The folders are removed, but the search path is not saved.
• inspect the search path and use Matlab
• if "everything" is ok, save the search path, if not, close Matlab without saving the search path.

    function     folder_list = remove_paths_Solution_ID_1_8T166L( filespec )
    %   http://www.mathworks.se/support/solutions/en/data/1-8T166L/index.html
    %   Solution ID: 1-8T166L
    %   Subject: Why do I get "same name as a MATLAB builtin" warnings on startup?

        narginchk( 0, 1 )

        if nargin == 0
            filespec = 'h:\m\Code2TMW\Path_potential_name_conflict.txt';
        end
        fid = fopen( filespec );
        cac = textscan( fid, '%s', 'Delimiter', '\n' );
        fclose( fid );

        expr = '(?<=Warning: Function ).+?(?= has the same name as a MATLAB builtin)';

        folder_list = cellfun( @(str) fileparts(char(regexp(str,expr,'match')))   ...
                            ,   cac{1}, 'uni', false                              ); 

        folder_list = unique( folder_list );

        cellfun( @rmpath, folder_list )
    end