Increment the row by one. Determine whether another row exists that meets the selection criteria. The _fetchRow method is used here instead of _getRow method. This approach works because the data set model object was initialized with the dataset data vector object. (See the fourth statement in this example, which uses the LOADCLASS and INSTANCE functions.)
      row + 1;
      call send( datid, '_fetchRow',
                 row, eod );