Have you looked at the descriptions of the two fields?

From https://www.ibm.com/docs/en/zos/2.1.0?topic=us-important-fields-in-sdwa I 
see:

<quote>
SDWAEC1
    This field contains the PSW that existed at the time of the error.
SDWAEC2
    The contents of this field vary according to the type of recovery routine:

        For ESTAE-type recovery routines (except for ESTAI routines): If a 
program establishes an ESTAE routine, and subsequently performs a stacking 
operation while running under the same RB as when it established the ESTAE 
routine, SDWAEC2 contains the PSW from the linkage stack entry immediately 
following the entry that was current when the ESTAE routine was established. 
Otherwise, SDWAEC2 contains the current RBOPSW from the RB that activated the 
recovery routine, and the PSW is the one from the time of the last interruption 
of that RB that occurred while the RB was unlocked and enabled. Bit SDWAINTF in 
SDWAXFLG indicates whether the contents of SDWAEC2 are from the linkage stack 
(SDWAINTF is 1) or from an RB (SDWAINTF is 0).
        For an ESTAI routine, this field contains zero.
        For an FRR, the field contains the PSW used to give control to the FRR.
</quote>

-- 
Walt

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