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Steve Richter wrote:
it would be great if i5/OS could be
improved where the complete state of a failed job and the database
files it has open could be saved at the point of failure. That way
the programmer has more complete information for researching what it
was that caused the weekend batch update job to fail.
In RPG III, that's as easy as putting an error indicator on your I/O
operation codes and following up with a DUMP when asserted. In RPG IV,
you can trigger a DUMP based on a MONITOR, (e) opcode extender or the
old classic error indicator. In CL, trigger a DMPJOB, DMPCLPGM, CHGJOB
LOG(4 0 *LIST) via MONMSG. I'm not a Coboleer, but I'd be shocked to
find that Cobol can't trap errors.
A different option aside from a dump is to use the error condition to
interrogate the file information data structure and the program status
data structure. You could then perform an application-specific action
such as writing an entry to a custom error log, printing a report,
sending an email, writing an RSS entry -- the sky's the limit when
you're a programmer!
If you'd rather not change code to trap errors, ask the operator (the
person answering the runtime halt) to take a 'D' or 'F' to capture a
post-mortem dump.
What would you like to see that these options don't allow?
--buck
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