When you code your input fields for the BUILD, FIELDS, OVERLAY, IFTHEN BUILD, IFTHEN OVERLAY, or IFTHEN PUSH parameters, remember to add 4 to the starting position to account for the 4-byte RDW. Likewise, when you code your output columns. For example, the following OUTREC statement puts the field in the first through sixth data byte of the VB input record into positions 21-26 of the VB output record.

  OUTREC FIELDS=(1,4,21:5,6)