Re: Use of SFLDSPCTL

Hello Vikas,

SFLDSPCTL is not actually required although it is usually specified to ensure 
text such as column headings is 
displayed when the control record is written.  It is usually conditioned by an 
indicator so no data is sent 
to the screen when SFLCLR, SFLINZ, etc operations are performed.

SFLDSP is mandatory becuase without it no data in the subfile would ever be 
displayed.  This keyword should 
be conditioned with an indicator because there may be no data in the subfile 
inwhich case SFLDSP should be 
turned off to avoid an I/O error.

Regards,
Simon Coulter.

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//--- forwarded letter -------------------------------------------------------
> Date: Wed, 30 Dec 98 09:06:32 -0500
> From: "VIKAS TASKAR" <vtaskar@wipsys.ge.com>
> To: MIDRANGE-L@midrange.com
> Reply-To: MIDRANGE-L@midrange.com
> Cc: david@midrange.com
> Subject: Use of SFLDSPCTL

> 
> Hi,
> 
> My Query is,
> 
> I would like to know whether it is mandatory to use the SFLDSPCTL
> keyword while coding the DDS for all subfile related programs.
> I have read that SFLDSPCTL is required only when you perform an input 
> operation to the Subfile Control Record Format--is that so?If so,why?
> And if SFLDSP is mandatory,why not SFLDSPCTL?
> 
> Thanks,
> 
>          ----Vikas

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