On Fri, Apr 28, 2023 at 08:51:22AM -0500, Pierre Fichaud wrote: > I thought that the 2nd display of the DCB would show the lrecl to be > 230 and the blksize to be 1150.
As did others, which is why a dump of the DCB was requested to see the actual values. > I'm reading the documentation for the umpteenth time and can't see > what I've missed or done wrong. Likely you are not setting the unlike concatenation bit in DCBOFLGS as it isn't set in the dump of the DCB. >From Seymour J Metz <sme...@gmu.edu>'s message > DCBOFLGS='30'X=DCBOFEOV+DCBOFOPN Possibly you are setting the DCBOFEOV bit or the system is setting it. A quick view of your source would show which... Seymour (and the manual) says you need to set: > OI DCBOFLGS,DCBOFPPC from z/OS 2.5 DFSMS Using Data Sets IBM SC23-6855-50 Chapter 25. Processing Sequential Data Sets Concatenating unlike data sets To concatenate unlike sequential data sets, you must modify the DCBOFLGS field of the DCB before the end of the current data set is reached. This informs the system that you are concatenating unlike data sets. DCBOFPPC is bit 4 of the DCBOFLGS field. Set bit 4, DCBOFPPC, to 1 by using the instruction OI DCBOFLGS,X'08'. If DCBOFPPC is 1, end-of-volume processing for each data set issues a close for the data set just read, and an open for the next concatenated data set. This closing and opening procedure updates the fields in the DCB and, performs the other functions of CLOSE and OPEN. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
