lem name and a comment</b> (e.g. source) just for logging   purposes. If probname is empty or not present, current time&amp;date and   default text is used,
                  comment will stay empty.
               </li>
            </ul>
         </div><pre> penm.probname = 'Example Problem 1'; penm.comment = 'comment comment';</pre><div>
            <ul>
               <li>[optional] <b>userdata</b> will get always pass in and from any callback   function, can be anything. If not set, an empty array will 