Geschachtelte Selects - wo liegt das Problem

Code: Alles auswählen.

IF chgdate-low > sy-datum OR chgdate-high > sy-datum.
  MESSAGE e008 WITH 'Datum darf nicht in der Zukunft liegen !'.
ELSE.
  SELECT * FROM  vbak
           WHERE bstzd = addition.
    IF sy-subrc = 0.
      SELECT * FROM cdhdr
               WHERE username   = changer
               AND   objectid   = vbak-vbeln
               AND   objectclas = 'VERKBELEG'
               AND   udate     >= chgdate-low
               AND   udate     <= chgdate-high.
        IF sy-subrc = 0.
          SELECT * FROM cdpos
                   WHERE objectid   = vbak-vbeln
                   AND   objectclas = cdhdr-objectclas
                   AND   changenr   = cdhdr-changenr
                   AND   tabname    = t_name
                   AND   fname      = f_name.
            WRITE: /3 chgdate-low,
                   16 chgdate-high,
                   29 cdpos-tabname,
                   46 cdpos-fname,
                   59 cdhdr-username,
                   71 vbak-bstzd.
            counter = counter + 1.
          ENDSELECT.
        ENDIF.
      ENDSELECT.
    ENDIF.
  ENDSELECT.
ENDIF.           "von Datumsprüfung

IF counter = 0.
  WRITE 'Kein Datensatz gefunden !'.
ENDIF.

Code: Alles auswählen.

sy-dbcount