Hi Karan,
Chandra is correct you are passing a single value.
If you want to keep your select-option, you should first transfer the select-option contents to a table range.
For instance:
data: lt_ebeln type range_ebeln_in_t.
(type range_ebeln_in_t and range_ebeln_in_s is available in SAP)
loop at s_ebeln.
append s_ebeln to lt_ebeln.
endloop.
Create import parameter
it_ebeln type range_ebeln_in_t in your FM.
SELECT EBELN FROM EKKO INTO TABLE it_EKKO
WHERE EBELN IN IT_EBELN.
Kind regards,
Wiel Ramaekers