I don't know about now, and it was the other Sort product. My very first screw-up of production data was pointing SORTIN and SORTOUT at the same dataset, It was a SORT operation. In the early 80s. The step successfully read all the data, closed for input, opened for output and die for lack of region, I guess while allocating the output buffers. Ands, at least in those days, this resulted in the tape being closed with an EOF mark right at the front.
> -----Original Message----- > From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On > Behalf Of Sri h Kolusu > Sent: Thursday, September 02, 2021 6:37 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: is it possible to allocate two dd to same temp file ? > > > I have used > > > > //SORTIN DD DSN=&&X,DISP=(OLD,PASS) > > //SORTOUT DD DSN=&&X<DISP=(OLD,PASS),VOL=REF=*.SORTIN > > Clark Morris, > > Please don't ever do that with a COPY operation. For SORT operation you > would be OK to refer the same file but for a copy operation it is not > recommended as it can cause lost or incorrect data and we do document that > restriction. > > For a copy application, the SORTIN data set should not be the same as the > SORTOUT data set or any OUTFIL data set because this can cause lost or > incorrect data or unpredictable results. > > https://urldefense.com/v3/__https://www.ibm.com/docs/en/zos/2.4.0?top > ic=statement-general-coding- > notes__;!!JmPEgBY0HMszNaDT!67oSZvWWMHtXxvlzXF1hwDMePWkQJyuQr > TSOUWDSwa5gKCnubhTR8ywfq8wMXQ$ > > > Thanks, > Kolusu > DFSORT Development > IBM Corporation > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
