By Changing this line 264 from
<td class="WADAResultsTableCell"><a href="boats_detail.php?RecNo=<?php echo $WADAboats->getColumnVal('RecNo'); ?>"><?php echo($WADAboats->getColumnVal('RecNo')); ?></a></td>
to:
<td class="WADAResultsTableCell"><a href="boats_detail.php?RecNo=<?php echo ($WADAboats->getColumnVal('RecNo')); ?>"><?php echo($WADAboats->getColumnVal('RecNo')); ?></a></td>
on local host
the error message became
Warning: mysql_free_result() expects parameter 1 to be resource, object given in C:\xampp\htdocs\boatsforsalenow_mysqli\Man_SeaLine\boats_detail.php on line 235