Hi according to your given suggestion I tried to follow the instructions given in your link, that is:
Change the code:
$currentTask = 'shipping_address';
if( (empty($task) || $task == $currentTask) && !empty($data[$currentTask])) {
to:
$same_address = JRequest::getString('same_address');
$currentTask = 'shipping_address';
if( (empty($task) || $task == $currentTask) && !empty($data[$currentTask]) && $same_address != 'yes') {
in the file administrator/components/com_hikashop/classes/address.php and that should fix the problem.
But after doing this, the page becomes completely blank, nothing comes up. When I restore the original file without the above suggested modification, it works normally as it would. But the problem of the error despite of selecting the checkbox remains same.
PLEASE GUIDE!!!