On Mon, 30 Mar 2020 10:11:53 -0400, Tony Thigpen wrote:

>Coming from the z/VSE world, some of the JCL stuff in z/OS just is 'weird'.
> 
I understand that in z/VSE tne DD statementw precede the EXEC for
the step.  Intuitive because allocation is done first.

>1) In z/VSE, the conditional jcl statements are more logical, not
>something akin to RPN.
>2) Our SETPARMs are sequential. You can have multiple SETPARMs of the
>same variable in the same step and intervening statements are processed
>using the 'then value' of the SETPARM.
>3) We can modify and even define SETPARM values via programs as a way to
>pass information between steps.
>
>Don't get me wrong, there are good things in both, but sometimes issues
>with the underlying basics of each lead to strange 'higher level' items.
>
>Working daily on z/VSE, z/VM and z/OS really get's confusing sometimes.
>Even simple things like responding to a console message. z/VSE needs the
>outstanding message number, followed by a space, then the response. Yet,
>z/OS usually needs a comma where z/VSE had the space, but not always.

-- gil

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