public static function deleteOlsubjects($obj_mainpacket)
 {
     $packet = $obj_mainpacket->packet;
     $SubjectId = $packet[0];
     $msg = "failed";
     $result = 0;
     $result_SubjectId = 0;
     $retResult = BL_manageOlsubjects::getOlsubjectsListBySubjectId($SubjectId);
     if ($retResult->type == 1) {
         $obj_Olsubjects = $retResult->data[0];
         $obj_result2 = DAL_manageOlsubjects::deleteOlsubjects($obj_Olsubjects->SubjectId);
         if ($obj_result2->type == 1) {
             $result = 1;
             $result_SubjectId = $obj_Olsubjects->SubjectId;
             $msg = "success";
         } else {
             $msg = "Sorry!!! Problem occured while deleting this Olsubjects";
         }
     } else {
         $msg = "Sorry!!! The Olsubjects you are tring to delete is not found";
     }
     $obj_mainpacket->returnValues = array($result, $obj_Olsubjects->SubjectId, $msg);
     $obj_mainpacket->main_setPacket();
 }