APPEND line TO itab funktioniert nicht

Code: Alles auswählen.

*---Text aus SO10 lesen----------------------------------------------*
  CALL FUNCTION 'READ_TEXT'
    EXPORTING
      id                      = 'PAMA'
      language                = 'D'
      name                    = 'ZMAIL_I2001_LFZED'
      object                  = 'TEXT'
    TABLES
      lines                   = lt_so10_text
    EXCEPTIONS
      id                      = 1
      language                = 2
      name                    = 3
      not_found               = 4
      object                  = 5
      reference_check         = 6
      wrong_access_to_archive = 7
      OTHERS                  = 8.
  IF sy-subrc <> 0.
* Implement suitable error handling here
  ENDIF.

*---Platzhalter ersetzen---------------------------------------------*
 LOOP AT lt_so10_text INTO DATA(ls_so10_text).
    IF ls_so10_text-tdformat = '/'.
      ls_text-line = '<br>' && ls_so10_text-tdline.
    ELSE.
      ls_text-line = ls_so10_text-tdline.
    ENDIF.
    REPLACE ALL OCCURRENCES OF '&P0002-VORNA&' IN ls_text-line WITH ls_mail_data-vorna.
    REPLACE ALL OCCURRENCES OF '&P0002-NACHN&' IN ls_text-line WITH ls_mail_data-nachn.
    REPLACE ALL OCCURRENCES OF '&P0001-PERNR&' IN ls_text-line WITH mv_pernr.
    REPLACE ALL OCCURRENCES OF '&P0001-WERKS&' IN ls_text-line WITH ls_mail_data-werks.
    REPLACE ALL OCCURRENCES OF '&P0001-ORGEH&' IN ls_text-line WITH ls_mail_data-orgeh.
    REPLACE ALL OCCURRENCES OF '&P2001-LFZED&' IN ls_text-line WITH ls_mail_data-lfzed.
    REPLACE ALL OCCURRENCES OF '&T500P-NAME1&' IN ls_text-line WITH ls_mail_data-werkstext.
    REPLACE ALL OCCURRENCES OF '&PR50D-ZZ_ORGTX&' IN ls_text-line WITH ls_mail_data-orgehtext.
    APPEND ls_text TO lt_text.
  ENDLOOP.