Exception raised in a loop

Hi , Is it possible to raised a exception inside a loop in oracle 9i??

   PROCEDURE somprocedure (resultado OUT generic_cursor)    IS

      tmp                 INTEGER;
      tmp_2               INTEGER;
      stringsql           VARCHAR (3000);
      CURSOR movimientosprimero
      IS
         SELECT DISTINCT *
                    FROM sometable
                   WHERE tipo_mov <> 'B';

      FOR regfichero IN movimientosprimero
      LOOP


.................

.................

         COMMIT;

	  exception
	  when others then
	  return;

      END LOOP;