Paul D'Angelo wrote:
I suspect this information is located in the JSCB  but  Where ?

Step information is where you'd expect it to be, in the Step Control Table (IIRC, mapping macro is IEFASCT). It's pointed to by the JSCB (either address, or a token to be resolved with SWAREQ). However, if you're going into other address spaces, you could hit it during a step change, in which case you might see misleading results.

Gerhard Postpischil
Bradford, VT

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