Re: IBM Mainframe JCL Conversion Tools

From: steve (santer1_at_juno.com)
Date: 09/09/04

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    Date: 8 Sep 2004 18:26:27 -0700

    Hey! I have extensive experience in UNISYS 2200 ECL. Who and where are
    you? I'd like to contact someone else out there who is using this
    stuff.

    Steve

    LX-i <lxi0007@netscape.net> wrote in message news:<Nq8Wc.29087$5s3.23216@fe40.usenetserver.com>...
    > Lawrence H Greenwald wrote:
    > >
    > > Having worked on IBM mainframes for over 20 years, I've seen COND and
    > > how bad it can be. Sorry, COND can only be used to check for a return
    > > code from a prior step or if a prior step has abended. The problem with
    > > COND is that it's bass-ackwards of what you would think would happen...
    > >
    > > If you've never seen it, typical use (overly simplified to save space)
    > > is this...
    > >
    > > //A EXEC PGM=AAA123
    > > /*
    > > //B EXEC PGM=XYZ456,COND=(12,GT,A)
    > > /*
    > >
    > > Now program AAA123 can set a return code (a value in register 15) just
    > > prior to exiting and step B will examine the value.
    > >
    > > If A returns a return code of, say, 10...then the expression is "is 12
    > > greater than 10?", then the condition is evaluated as TRUE and (here's
    > > where it's bass-ackwards), step B is BYPASSED (program XYZ456 is NOT
    > > executed)!!!
    > >
    > > If A returns a return code of, say, 14...then the condition is evaluated
    > > as FALSE and the step B (program XYZ456) is EXECUTED!!
    > >
    > > You think it's bad with one code, try it with multiple codes from
    > > multiple steps!! Yech!!
    >
    > I've recently gotten into some more complex ECL (Executive Control
    > Language, on the Unisys 2200-style mainframes), and their test condition
    > is the same - it seems backwards from the way the 3GL languages do
    > If/Else constructs. I still don't have a good enough grasp of it
    > (without the manual at my fingertips) to throw together a little example
    > here...
    >
    > Thanks for the explanation!
    >
    >
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