Thanks. Perfect. Nice of IBM to document this. :-( Yes, I know that coding DSN=NULLFILE is equivalent to coding DUMMY, but it does not follow that coding DUMMY would necessarily set a DSN of 'NULLFILE'. The words "DUMMY" and "NULLFILE" appear nowhere in the documentation of the JFCB.
The JFCB has bits for things like "this is a 7-track tape with odd parity that is to be rewound but not unloaded unless it's Tuesday" -- a bit for DUMMY would have made a lot of sense, and been more generally useful, IMHO. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Rob Scott Sent: Thursday, February 11, 2010 7:10 AM To: [email protected] Subject: Re: Determining if DUMMY allocation Dataset name of NULLFILE in the JFCB Rob Scott Developer Rocket Software 275 Grove Street * Newton, MA 02466-2272 * USA Tel: +1.617.614.2305 Email: [email protected] Web: www.rocketsoftware.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Charles Mills Sent: 11 February 2010 14:38 To: [email protected] Subject: Determining if DUMMY allocation Is there a way to determine if a DD statement has been allocated DUMMY, short of SVC 99 info retrieval? I thought I remembered bit or other indicator in the JFCB, but now I don't see it. My preference would be for something low overhead (I have a bunch of DD's to look up) and that did not require below the line storage (such as searching the TIOT and using SWAREQ to get the JFCB). Charles Mills ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
