Srvpgm procedure return value must be type="int" and length="4" when using *PCML.

I'm trying to compile this service program with the 'PCML' info in it
so that I can use the IBM Web Services Wizard to materialize the rpg
srvpgm
as a web service. I have only a single function in it.
(I have already made one (web service) using an RPG ile pgm object.)

The module compiles fine -without- the PGMINFO(*PCML:*MODULE) in the
H-spec.

When I add it to the H-spec, I get a very generic message in the
compiler
listing...

RNF0203 - ERRORS WERE FOUND WHILE GENERATING THE PROGRAM INFORMATION TO
BE PLACED IN THE MODULE

Not very much to go on (to my mind anyway).

I added the infostmf to the compile command (for s & giggles) as per
below...

CRTRPGMOD MODULE(JRPERS/FRKEY_F) SRCFILE(JRPERS/QSRVSRC) SRCMBR(FRKEY_F)
PGMINFO
(*PCML) INFOSTMF('/tmp/pcml/frkey_f.txt')

It still didn't compile, but, when I looked in the stream file it
generated, I found...

************Beginning of data**************

<pcml version="4.0">

<!-- RPG module: FRKEY_F -->

<!-- created: 2009-05-08-08.40.02 -->

<!-- source: JRPERS/QSRVSRC(FRKEY_F) -->

<!-- 23 -->

<program name="GETFOREIGNKEY" entrypoint="GETFOREIGNKEY"
returnvalue=" ">
<!-- Error: return value must have type="int" and length="4". (E)
-->
<data name="ACTION" type="char" length="2" usage="input" />

</program>

</pcml>

************End of Data********************

So, okay, the return value must be integer.

Uuummm why? Why can't the return value be character?

This won't work ---
d getForeignKey...
d pr 20
d Action 2 const

But this will work ---
d getForeignKey...
d pr
d Action 2 const
d Action 20

And so will this ---
d getForeignKey...
d pr 10i 0
d Action 2 const
d Action 20

Is their (ibms) intent- to use the 'return value' as a lot of apis
generally do,
as an indication of success or failure..? ..??

John B