Put the read table inside the case statement:
CASE u_ucomm.
WHEN '&IC1'.
READ TABLE i_final INDEX us_selfield-tabindex.
IF SY-SUBRC = 0.
SET PARAMETER ID 'ANR' FIELD i_final-aufnr.
...
Put the read table inside the case statement:
CASE u_ucomm.
WHEN '&IC1'.
READ TABLE i_final INDEX us_selfield-tabindex.
IF SY-SUBRC = 0.
SET PARAMETER ID 'ANR' FIELD i_final-aufnr.
...