customer exit variable

Hello Gurus,

I have query where 'ZDELDATE' customer exit variables and them should be filled from an ODS with the values but where are some doubts. Case I_VNAM is not recognised and the issue is always a zero, although the data exist. I post my coding hier. Maybe somebody has idee.

DATA:.....

CASE I_VNAM.

WHEN 'ZDELDATE'.

IF I_STEP = 1.

LOOP AT I_T_VAR_RANGE INTO LOC_VAR_RANGE WHERE VNAM = 'ZDELDATE'.

CLEAR L_S_RANGE.

• customer requested delivery date

• Select all from /bic/azsd_o12a00 where Requested delivery date is empty

SELECT * FROM /bic/azsd_o12a00 INTO TABLE i_t_azsd_o12a00

WHERE dsdel_date = '00000000'.

LOOP AT i_t_azsd_o12a00 INTO wa_azsd_o12a00.

*Slect Delivery number and delivery item, where dsdel_date field ist emty

SELECT SINGLE * FROM /bic/azsd_01100 INTO wa_azsd_01100

WHERE deliv_numb = wa_azsd_o12a00-deliv_numb

AND deliv_item = wa_azsd_o12a00-deliv_item.

SELECT SINGLE * FROM /bic/asdo000300 INTO wa_azsd_000300

WHERE doc_number = wa_azsd_01100-refer_doc.

IF sy-subrc = 0.

v_loc_date = wa_azsd_000300-req_date.

ENDIF.

L_S_RANGE-LOW = v_loc_date.

L_S_RANGE-SID = 'I'.

L_S_RANGE-OPT = 'EQ'.

APPEND L_S_RANGE TO E_T_RANGE.

CLEAR v_loc_date.

ENDLOOP.

EXIT.

ENDLOOP.

END IF.

Regards