Passing a pointer-based array as a parameter

I searched, but it's all greek to me.  I'm not even sure I've got the
terminology correct, so feel free to correct where needed.  And, by all
means, provide links as appropriate.

I've got an ILE RPG program (PGMA) that will call an ILE RPG service program
(SRVPGMB).  I would like SRVPGMB to return a dynamically allocated array
back to PGMA.  In real life, the array could end up having 10 elements or
20000 elements.

Unfortunately, the compiler doesn't think much of passing a dynamically
allocated array as a parameter, issuing RNF5029 "Result-Field entry of PARM
operation in *ENTRY PLIST is not valid; specification is ignored."  I tried
to pass FLa, defined below:

   d FL@             s               *
   d                 ds                  Based( FL@ )
   d FLa                                 Dim( 32766 )
   d  Fld1                         10    Overlay( FLa : *Next )
   d  Fld2                         10    Overlay( FLa : *Next )
   d  Fld3                           3i 0 Overlay( FLa : *Next )

Is there a way to accomplish this?

TIA,
Dan