Wrap an RPG Procedure with an SQL External Procedure

Hi all,

I am working on a service program that will need to be called from both SQL
and other RPG bound applications. I have created the SQL external procedure
to call one of the RPG procedures in the service program like so:

CREATE PROCEDURE LIBRARY.CALLRPGPROC (
IN APARM CHAR(12) )
LANGUAGE RPGLE
SPECIFIC LIBRARY.SRVPGM01
NOT DETERMINISTIC
MODIFIES SQL DATA
CALLED ON NULL INPUT
EXTERNAL NAME 'LIBRARY/SRVPGM(RPGPROCEDURE)'
PARAMETER STYLE SQL ;

The RPG procedure looks like this:

d rpgProcedure...
d pi N
d pr_aparm 12a const


When I run the SQL proc however, I get the following error:
MCH3601 unmonitored by XIG11S600 at statement 0000000445
(pointer not set for location referenced)

Statement 445 of the RPG proc is the return:
000445 return true;

I have searched the archives, google, and IBM docs but have not been
successful in finding information on how to call an RPG service program's
procedure that returns a value, from within an SQL external procedure. Has
anyone ever found any mention of this anywhere? Is it possible, or do I
have to change my service programs to use inout parms rather than returning
a value just so that I can wrap it with an SQL proc?

Thanks in advance,
Robert Newton
EDPS
Electronic Data Processing Services
Software Engineer
rnewton@xxxxxxxxxxxxxxxxx

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