[Default] On 27 Feb 2017 07:44:46 -0800, in bit.listserv.ibm-main
[email protected] (Bill Woodger) wrote:

>On Monday, 27 February 2017 15:00:03 UTC+1, Allan Staller  wrote:
>> No. IBM chose not to break thousands upon thousands of programs that were 
>> perfectly happy with 100 byte parm fields, provided via JCL.
>> They added a new mechanism for those program, where 100 bytes was not 
>> sufficient.
>> 
>
>Unless you change the JCL to use PARMDD on the EXEC instead of PARM on the 
>EXEC, nothing changes.
>
>If you make that change for no purpose, and then the program is doing 
>something which relies on there being 100 bytes of data as a maximum 
>implicitly, then you may have a problem. But how is that IBM's fault? No-one 
>forced the JCL change.

When did it change to 100?  I always tested for 144 as a maximum or
whatever I was expecting going back to MVT.

Clark Morris
>
>If you don't change the JCL, the program expecting a maximum of 100 bytes and 
>never needing any more than that will work as designed for the next... well, 
>forever.
>
>Have you got an example from one of the thousands and thousands of breaks 
>caused?
>
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