esmie moo wrote:

>I am altering a large amount of gdg dsns which are migrated.
>So it looks like the recall has to be done in order to process those files. 

Do something like this, hopefully after hours:

IKJEFT - Recall say 500 dsn in one SYSIN. 
Do your IDCAMS ALTER job with one SYSIN for all those datasets.
IKJEFT Migrate them again to ML2.

Repeat (wash, rinse, dry) above a few times for the rest.

(If you can first group your datasets per HSM ML2 volume, much better)

I usually use P in ISPF option 3.4 to create a list or do something like that 
from ISMF for such work.

HTH!

Groete / Greetings
Elardus Engelbrecht

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