On Thu, 25 Feb 2021 23:57:08 -0600, Ravi Gaur <[email protected]> wrote:

>Writing and debugging an assembler code which has MODESET instruction to 
>change key and while debugging it via IDF or Debug tool both abend with 
>S047(APF) issue. Anyone know a way to debug facility for code without using 
>IDF/Debug tool?

Set a  slip trap on s=047 and use IPCS to read the resulting sdump. 

Regards, Barbara

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