Syntax check please

Question

I am getting error as
<b>"r_bktxt " is a table with out header line  and therefore no component called "SIGN"</b>
with the below code . Could you please correct .I am writing this code in method of  BADI in sap4.7.
To remove the hardcode logic and use the ZKAP entry
DATA : wa_zcharval1 TYPE zkap-zcharval1.
DATA : r_bktxt TYPE RANGE OF zkap-zcharval1.
    r_bktxt-sign = 'I'.
    r_bktxt-option = 'BT'.
    SELECT zcharval1 INTO wa_zcharval1
           FROM  zkap
           WHERE zcharfld1 = 'U319'
           AND   zcharfld2 = 'ACTIVE_BURKS'
           AND   znumfld1  = '0'
           AND   zseqno    = '0'.
      r_bktxt-low = wa_zcharval1.
      APPEND r_bktxt.
    ENDSELECT.
    SELECT uzawe
           UP TO 1 rows
           FROM  lfb1
           INTO  wa_uzawe
           WHERE lifnr = i_rbkpv-lifnr    " bseg-lifnr
           AND   bukrs IN r_bktxt.
    ENDSELECT.

Answer 1

Hello Sam
You coding is correct but you need to define a separate work area.
DATA :
  r_bktxt TYPE RANGE OF zkap-zcharval1,  " itab w/o header line
  ls_rng  LIKE LINE OF r_bktxt.
  ls_rng-sign = 'I'.
  ls_rng-option = 'EQ'.
  APPEND ls_rng TO r_bktxt.
Regards
  Uwe