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  2. RPG400-L
  3. September 2005

RE: Sorting a user space

D                       DS              Align
D PtrAry                32      Dim(100)
D ThePtr                  *   Inz(*Null) Overlay(PtrAry:1)
D The1stSortField        2A   Overlay(PtrAry:17)
D The2ndSortField        2A   Overlay(PtrAry:19)
D Filler                12A   Overlay(PtrAry:21)
That'll work as long as you have 2047 or fewer entries to sort. (or 1023 if you're running an older release of OS/400).
Also, your filler field is unnecessary, since the entries in the DS overlay a 32A field, they'll always be aligned on a 32 byte boundary, with or without the filler.
Also, the ALIGN keyword is doing nothing in this example, since there's only one field in the data structure, (not counting the overlaid ones) there's no field after it to align.

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