No, those DCB parameters are not supported. I don't have immediate access to the open processing at the moment, so I can't say how the error condition would currently be handled. I believe that the code that opens SYSMDUMP uses a DCB with RECFM=FBS,LRECL=4160 supplied. The DCB wins when logical conflicts occur, so the DCB OPEN exit receives control with BLKSIZE=3120 still incorrectly shown. Then the DCB exit will either fix the mismatched LRECL and BLKSIZE or will suffer an ABEND when OPEN is asked to continue. A successful repair of BLKSIZE would cause that data set to be overwritten and DCB attributes set to RECFM=FBS, LRECL=4140, and BLKSIZE=4160.
R.L. (Bob) Wright, z/OS MVS Service Aids, R4GA, 708-1F30, [EMAIL PROTECTED] Robert Wright/Poughkeepsie/IBM @ IBMUS (notes to notes) IBMUS(RLW) (host to notes), PLPSC.RLW (MVS) or S390VM.RLW (VM) Jerry Ragland wrote on 10/24/2005 01:30:55: > Is it possible to have a valid SYSMDUMP withe the following properties - > RECFM=VB > LRECL=139 > BLOCKSIZE=3120 ---------------------------------------------------------------------- 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

