I realized that my post was missing some important details about the 
scenario. See "add:" below.

<snip>
I tried a simple experiment:
-- Mainline sets 2 ESTAEXs
-- Mainline blows up  <add: in AMODE 64>
-- Newest ESTAEX routine gets control and updates the "AMODE 64" bit in 
the PSWs of SDWAEC1, SDWAEC2, SDWAPSW16 <add: to turn the bit *off*>
-- That ESTAEX routine percolates
-- Older ESTAEX routine gets control. It finds the AMODE 64 bits on in all 

of those PSWs.
</snip>

Regarding SpieOverride, we are considering changing that option not to 
require authorization.

Note that you can do this yourself:
You can set a "blocking" ESPIE -- ESPIE with no program interrupts 
identified.
Then, when you're done, issue ESPIE RESET.

As long as these operations don't require authorization (I don't think 
they do but I'm not positive), there's little reason that doing the same 
thing for an ESTAEX should require authorization.

Peter Relson
z/OS Core Technology Design


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