On Fri, 24 Jun 2011 12:24:13 +0530, sourabh khandelwal 
<[email protected]> wrote:

>Hello,
>         I was applying RSU on one of our z/OS system but during apply
>process I received D37-04 abend for below datasets.
>
>1) DIT.V1R3M0.SDITMOD1
>2) SYS1.NUCLEUS
>3) SYS1.SIOALMOD
>
.
.
.
>2) I had bring down current z/OS system on which I was applying RSU and I
>had one more z/OS system . So I tried renaming SYS1.NUCLEUS for the older
>system by specifing the dataset name with volume. But as this system also
>contain SYS1.NUCLEUS, which matches with old system . So its has not 
allowed
>me to rename the dataset.
>
>
 
I can't think of any work entity (job, STC or anything else) allocating 
SYS1.NUCLEUS in a way resulting in ENQing on its name.
You, most likely, have a never-endind job that does nothing except JCL-
allocating SYS1.NUCLEUS together and some other critical datasets alike, just 
to prevent accidental deletion of them.
 
Try GRS displays to find out who is doing this.

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