When CA Disk jobs that examine date fields are run very shortly after midnight, you must take into account the rapid aging that occurs at the stroke of midnight. Data sets that can have been created or used merely minutes ago suddenly appear as if the action took place a day ago!
When batch jobs create data sets, the create date used by the operating system is taken from the date the job started, not the date that each specific step of the job started. Therefore, data sets actually created in steps running after midnight, but part of a multistep job that began before midnight, will have create dates of the previous day — and immediately appear to be one day old!
Any selection tests based upon date values should take these two items into account, or many more data sets can be selected than were intended.
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