Subfiles in batch job

[D.BALE@xxxxxxxxxxxxx]

First off, you cannot open a display file in batch.  Give it a UsrOpn (or UC)
and do a no-op Open.  I.e.:
     C   LRNLR             OPEN FILENAME

The subfile logic must be replaced with multi-occurrence data structures (my
preference) or arrays.  To keep the display file formats defined in the
compiled application, the I/O operations must also be no-op'd.

Those are the basics.  If you don't deal with multi-occurrence data structures
on a regular basis, it can be a little tricky at first.

Quite honestly, if this is not a monster app your coworker is converting, it
should probably be written from scratch.  I have used the above technique
twice in my 15+ years career, and it's not pretty.  But it can be a real
lifesaver when you've got a legacy, monolithic, mostly undecipherable
application that needs to be converted to batch by "yesterday".

Dan Bale
IT - AS/400
Handleman Company
248-362-4400  Ext. 4952

-------------------------- Original Message --------------------------
A coworker is converting an interactive RPG program to be used in a batch job.
To keep the changes as minimal as possible he would like to use the existing
display file and associated subfile logic, without the screen I/O of course.
 He
is receiving "session or device error" messages when trying to open the
 display
file in the batch job.  Is it possible to use a display file in batch?  If so,
what must be defined in the program and/or display file to make it work?

Thanks in advance!

Ed De Ryder
Ed_DeRyder@kleintools.com
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