CONCATENATE with blanks space

To CONCATENATE string with blank space in middle.
This syntax applicable start from SAP ECC 6.0

DATA : v_string(40).
CONCATENATE 'I' 'need' 'more' '     ' 'space.' INTO v_string
            RESPECTING BLANKS
            SEPARATED BY space.
WRITE:/ v_string.

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For R/3 release 4.6C, just do a little tricks.

  DATA : v_err LIKE tline OCCURS 0 WITH HEADER LINE,
         var1(20), var2(10), var3(10), var4(10), var5(10), x(1).

  v_err-tdformat = '*'.
  var1 = 'Material           0'.
  var2 = 'QTY PR   1'.
  var3 = 'QTY PO   2'.
  var4 = 'QTY SO   3'.
  var5 = 'Selisih  4'.
  CONCATENATE var1 var2 var3 var4 var5
          INTO v_err-tdline SEPARATED BY space.
  x = 0.
  DO 5 TIMES.
    REPLACE x WITH space INTO v_err-tdline .
    x = x + 1.
  ENDDO.
  write:/ v_err-tdline.