Datensätze mit RFC FuBa paketweise bekommen

SELECT COUNT( * ) FROM mara INTO @DATA(gv_total)

                 WHERE matnr IN @gt_mat_range.

DO.

SELECT matnr FROM mara INTO TABLE @DATA(gt_mara)
            UP TO gv_packsize ROWS
            WHERE matnr IN gt_mat_range
              AND matnr > gv_last_mat
            ORDER BY matnr ASCENDING.

IF sy-dbcnt = 0.
 EXIT.
ENDIF.

gv_last_mat = gt_mara[ lines( gt_mara ) ].
gv_current  = gv_current + gv_packsize.

IF gv_current > gv_total.
 gv_current = gv_total.
ENDIF.
             
CALL FUNCTION 'Z_GET_MAT_SHORTEXT' DESTINATION gv_rfc_dest
 EXPORTING
  it_matnr         = gt_mara
 IMPORTING
  et_matnr_maktx   = gt_matnr_maktx_dest
 EXCEPTIONS
  system_failure        = 1
  communication_failure = 2
  OTHERS                = 3.
IF sy-subrc <> 0.
 RAISE EXCEPTION TYPE zcl_bal.
ENDIF.

ENDO.