Hey Gil,

Is the IF/THEN assuming, big word here, that the 1 is a return code, just a 
thought

Sent from my iPad
Scott Ford
Senior Systems Engineer
www.identityforge.com



On Feb 24, 2012, at 8:37 AM, Paul Gilmartin <paulgboul...@aim.com> wrote:

> On Thu, 23 Feb 2012 07:52:38 -0500, Bill Ashton wrote:
> 
>> I use this sort of trick often for controlling sections of JCL, For
>> example, I might have a step or two that deletes and allocates files, then
>> another step that processes data into the new files, and finally a step
>> that prints report files from the job. Then at the top I would SET ALLOC  =
>> either 1 to run or 0 to not run, SET PROCESS to 1/0, and SET REPORTS to 1/0.
>> 
>> In the JCL I start with a do-nothing BR14, and then surround each section
>> with IF &ALLOC=1 THEN......ENDIF   If &PROCESS=1 THEN.....ENDIF and If
>> &REPORTS=1 THEN.....ENDIF
>> 
> This would appear to be disallowed by:
> 
>   *  z/OS V1R13.0 MVS JCL Reference
>   * SA22-7597-15
> 
> where I read:
> 
> 17.1.9 Considerations when Using the IF/THEN/ELSE/ENDIF Construct
> 
> Be aware of the following considerations when using the IF/THEN/ELSE/ENDIF 
> statement construct:
>   ...
>   # You can specify symbolic parameters on
>     IF/THEN/ELSE/ENDIF statements provided that
>     they resolve to one of the supported
>     relational-expression keywords listed in the
>     preceding topic (that is, RC, ABEND, ...). Any
>     other symbolic parameters, even if accepted by
>     the system, are not intended or supported.
> 
> Would you submit to a code review any code that depends on
> behavior which is "not intended or supported" by the vendor?
> 
> Which leaves a question: what about constructs that are not
> documented in an earlier topic as supported, but are coded
> directly, not involving symbolic parameters?
> 
> -- gil
> 
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