IEH was for system utilities; IEF, application or dataset oriented. It was IEFBR14, which was used mainly for preallocating datasets for a job. It, unfortunately, had a bug that made it difficult to use in a large job that had general checks for return codes - it didn't zero R15 before doing the BR R14, so its return code was always its entry point. I know that this defect was APARd as early as O/S 360 Release 15. It was not fixed until much later, Release 21.1 IIRC. We had our own version for all of the years that I supported O/S 360.
Regards, Richard Schuh > -----Original Message----- > From: VM/ESA and z/VM Discussions [mailto:[EMAIL PROTECTED] > Behalf Of Anne & Lynn Wheeler > Sent: Sunday, October 09, 2005 8:10 AM > To: VMESA-L@LISTSERV.UARK.EDU > Subject: Re: IEH/IEB/... names? > > > [EMAIL PROTECTED] wrote: > > Perhaps you know the answer: > > long ago I used IBM mainframes. > > Utilities started with IEH, IEB, etc. > > What were the rules for those prefixes? > > > > I remember IEHLIST (list files) and IEBGENER (file copy). > > Wasn't IEHBR14 the null program so the JCL's DD side-effects > > could occur (such as file creation or deletion)? > > >
