On 15 May 2009 09:32:23 -0700, in bit.listserv.ibm-main you wrote: >Perhaps this explains the observed action? > >http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/IGY3LR31/5.2.4 > ><quote> >BLOCK CONTAINS > 0 can be specified for QSAM files. If BLOCK CONTAINS 0 is specified for a > QSAM file, then: > > * The block size is determined at run time from the DD parameters or > the data set label. If the RECORD CONTAINS 0 CHARACTERS clause is specified > and the BLOCK CONTAINS 0 CHARACTERS clause is specified (or omitted), the > block size is determined at run time from the DD parameters or the data set > label of the file. For output data sets, with either of the above conditions, > the DCB used by Language Environment will have a zero block size value. If > you do not specify a block size value, the operating system might select a > system-determined block size (SDB). See the operating system specifications > for further information about SDB. ></quote>
I checked the reference you gave and for QSAM files, if the BLOCK CONTAINS clause is omitted, BLOCK 1 RECORD is assumed. This stupidity has aggravated me for years. ---------------------------------------------------------------------- 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
