BAPI - Tratar mensajes error

- Utilizar la sentencia MESSAGE y añadir INTO p_variable.
- MF BAPI_MESSAGE_GETDETAIL.
- MF RPY_MESSAGE_COMPOSE.
- MF C14ALD_BAPIRET2_SHOW.
- MF C14Z_MESSAGES_SHOW_AS_POPUP.

MESSAGE ID wa-id TYPE wa-type NUMBER wa-number
                INTO wa-message
                WITH wa-message_v1 wa-message_v2 wa-message_v3 wa-message_v4.