The CDX is an OCO control block. I will comment only to say that it does not contain a DDNAME. I do not have any idea why you thought it "normally" does.
If your module was fetched from the LNKLST, you can use SETPROG LNKLST TEST NAME(CURRENT) MOD(xxxxx) and it will tell you the data set in which it resides. I suppose you could take a dump of the LLA address space and scan around for your module name In general z/OS does not keep track of from which data set a module has been fetched, whether the fetch is resolved from DASD or LLA. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- 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