I see

IEF285I   SYS19218.T143507.RA000.xxx00114.R0105346     PASSED 
IEF285I   SYS19218.T143507.RA000.xxx00114.R0105347     PASSED 
IEF285I   SYS19218.T143507.RA000.xxx00114.R0105348     PASSED
...

And

IEF285I   SYS19218.T143507.RA000.xxx00114.R0105346     DELETED
IEF285I   SYS19218.T143507.RA000.xxx00114.R0105347     DELETED
IEF285I   SYS19218.T143507.RA000.xxx00114.R0105348     DELETED
...

So it looks to me like DSCBs were actually created.

Charles


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of CM Poncelet
Sent: Wednesday, August 7, 2019 12:34 PM
To: [email protected]
Subject: Re: CPU time cost of dynamic allocation

>From years ago, I *think* an IEFBR14 step with DISP=(,CATLG) [or
(,PASS)] does not physically allocate a dataset on a VOLSER but only
registers it in the usercat. Have you checked whether it is in the VTOC?

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