RESPONSE and REASON values for INQ_APPLICATION_DATA:
RESPONSE REASON
OK None
EXCEPTION DPL_PROGRAM
NO_TRANSACTION_ENVIRONMENT
TRANSACTION_DOMAIN_ERROR
DISASTER ABEND
LOOP
INQ_FAILED
INVALID INVALID_FUNCTION
KERNERROR None
PURGED None
state data access functions
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CICS TS for OS/390: CICS Customization Guide