begin
   if :blk.position = 'MANAGER' then
      If :global.direction = 'UP' then
         if :system.cursor_record = 1 then
            raise form_trigger_failure;
         else
            up;
         end if;
      else   /* assume 'DOWN' */
         if :system.last_record = 'TRUE' then
            raise form_trigger_failure;
         else
            down;
         end if;
      end if;
   end if;
end;