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  2. RPG400-L
  3. April 2005

Re: Difference betwen Exfmt and Write/Read

Siva wrote:
I am practised to use Exfmt command to show the screen.
Could anyone tell me what is the difference between Exfmt
and Combined Write/Read of Display file.
I heard both of them do the same.
Is it so?. or is there any other difference ?.
At what suituation one can use that. Please let me know...


Siva -

For most practical purposes, they are the same.

However, the advantage of WRITE followed by a READ (with an error indicator specified) on the display file will allow you to end the program for inactivity if you specify a maximum record wait time (WAITRCD) on the CRTDSPF command.

When the program is running, once the number of seconds specified on the WAITRCD for the display file has been reached control is returned to the program and the error indicator is turned ON.

This is the standard design for JDE World interactive programs - WRITE/READ is always used instead of EXFMT.

Regards,
Steve

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