Steve Thompson wrote on 10/25/2006 10:44:18 AM:

> REFR as an attribute, does this also imply that the code is
> self-relocating so that if the code is reloaded at a different place, it
> is still able to continue execution (of the task in flight)? So PRE DAT
> days, this would be an overlay type program, right?

REFR was intended to let the system know that it could re-fetch a module in
circumstances such as storage going bad or overlays being detected that
might impact the module.  As things like the ability to load from DCBs that
had been opened temporarily became prevalent, it became less practical, and
storage was becoming more reliable in the same time frame.  It's no longer
supported but the attribute has been retained.

Bob Wright - MVS Service Aids
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