Re: How to debug RPG pgm called from Java on a PC

Steve Moland wrote:

Thank you all for responding. I'm going to back up and learn a little
more
about the java code because I think the issue is a parameter issue from
the
java side. Here's why.

The RPG program is also called from other rpg programs and works
perfectly.
The box I'm doing this on is V4R5 and there is no Sbreak in STRDBG. It's
there on m V5R2 box but it would take too much to move all that I need
there
right now.
The dump of the failed program shows that the failed program failed
before
the first executable line of code executed.
Eval Fcycle = 1 never happened.
I need to get WDSC installed and learn to use it to a minimum level on
the
V5R2 box before I pursue any more of this.

thanks again for trying to help

For debugging, you could substitute a different program that just dumps
out its parameters. Start with just 1 byte parameters, however many you
think you are passing. Then try again with larger sizes if the
beginning of the parameters look correct.

D numparms s 10i 0
C *entry plist
C parm p1 1
C parm p2 1
C parm p3 1
C eval numparms = %parms
C dump(a)
C return

To make it easier to debug this type of program in the future, it would
be good to avoid letting the automatic RPG processing do anything that
could cause your program to fail before it gets control (make all your
files USROPN, avoid UDS data areas). Also, add a MONITOR around all
your code; in the ON-ERROR, add some calls to QCMDEXC to do DSPJOB
OUTPUT(*PRINT) and DSPJOBLOG OUTPUT(*PRINT).

Fmyfile IF E DISK USROPN
D qcmdexc pr extpgm('QCMDEXC')
D cmd 3000a const
D cmdlen 15p 5 const
D qcmdexc_len c 3000
/free
monitor;
// keep any existing monitors, (E) etc that you already have
// to handle normal expected errors
open myfile;
...
on-error;
// handle an unexpected error
qcmdexc ('DSPJOB OUTPUT(*PRINT)' : qcmdexc_len);
qcmdexc ('DSPJOBLOG OUTPUT(*PRINT)' : qcmdexc_len);
endmon;
*inlr = '1';
/end-free

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