<snip>I'll accept that as almost true. But BLDL (I assume LOAD uses that or something similar) needs to find the directories to search. I'm trying to RTRM and understand. I guess it can examine DEBAMLNG bytes in DEBEXTNM to find the first extent of each catenand which must contain the directory. </snip>
BLDL uses the information in the DEB to determine which data sets' directories are to be checked. <snip> But that's not enough to really identify the data set; only unit and address. Bummer. The pain customers endure because storage was so expensive a half-century ago that 32 bytes couldn't be spared for flags indicating which extents belong to authorized data sets. </snip> I believe that most would use RDJFCB to find the data set name(s) comprising a concatenation. The DEB can be traversed (not trivially, but not overly hard) to correlate. I'm sure many on this list could write the sort of program/exec that would solve Charles' quandry, taking as input the JCL and using things like CSVAPF and IsItMgd. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
