have to check for venum if the venum is present then it shd come out of the program
FORM validate_venum .
DATA : lv_venum TYPE vekp-venum.
SELECT handling_unit
UP TO 1 ROWS
INTO lv_venum
FROM zws_data
WHERE handling_unit EQ nast-objky.
ENDSELECT.
IF sy-subrc NE 0.
MESSAGE e006 WITH lv_venum.
WRITE:/ sy-msgty, sy-msgno NO-GAP, ':', l_msg.
Write :/ lv_venum, ' already present '.
ENDIF.
ENDFORM.