OVRPRTF within RPGILE

I'm trying to do something I've never done before.  It seems simple
enough to me, but I can't get it to work.

It's within an RPG ILE program.  Printer file PO15PO is defined like
this:

FPO15PO    O    F  145        Printer OflInd(*INOA)
F                                     INFDS(PrtFDS)
F                                     UsrOpn       

Before I open the file, I issue an OVRPRTF command via a service
program, like this:

D @OvrPrtF        C                   'OVRPRTF PO15PO OUTQ(FAXSPLF)'
D SysCmd          S           2048

C                   Eval      SysCmd = @OvrPrtF
C                   CallP     ExecCmd(SysCmd)  

The service program containing procedure ExecCmd is compiled
ACTGRP(*CALLER).  I've issued a bazillion OVRPRTF within CL programs
over the years, to a specific OUTQ, and it works.  Is there something
screwy about USROPN that prevents this?

Thanks.

-- 
-Jeff
The opinions expressed are my own and not necessarily 
the opinion of my company.  Unless I say so.
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