>> Does DTFCP still exist? I haven't heard of DTFCP. DTFDI gives device independence. The following are all the DTFs I found on the system.
DTFCD DTFCN DTFDA DTFDI DTFDU DTFIS DTFMT DTFPH DTFPR DTFSD DTFSR Sincerely, Dave Clark -- int.ext: 91078 direct: (937) 531-6378 home: (937) 751-3300 Winsupply Group Services 3110 Kettering Boulevard Dayton, Ohio 45439 USA (937) 294-5331 On Fri, Dec 12, 2025 at 6:39 PM Charles Mills <[email protected]> wrote: > FWIW, Google AI sez > > In IBM VSE, trying to read a sequential file (like a card reader input > stream) past the end-of-file (EOF) marker will result in an error or an > exception. You cannot "read past EOF" in the conventional sense of > retrieving more data, because no more data exists. The standard approach is > to detect the EOF condition and stop reading. > > I recall doing something like this but it was literally 50 years ago. > > The problem is complicated because there is no real card reader (I assume > :-/). When I did it there was a real 2540, but the program was actually > reading from POWER, not from the card reader. That ship had already sailed. > > I have no experience with VSE in the post-card-reader era. How do you > submit the job? From CMS via a virtual card reader under VM? > > Does DTFCP still exist? It was a badly-kept IBM secret that gave you DTF > device-independence, and more flexibility than any of the supported DTFxx > macros. > > Charles > >
