USRFF trace record for user requested work area

This USRFF trace record represents a user request for a work area trace.

USRFF     FFF     ASCB hhhhhhhh JOBN cccccc
DCB       xxxx ...
WKAREA1   xxxx ...
WKAREA2   xxxx ...
WKAREA3   xxxx ...
WKAREA4   xxxx ...
WKAREA5   xxxx ...
WTG TBL   xxxx ...
USRFF
Identifies the Open/Close/EOV trace record formatting routine (IMDUSRFF).
FFF
Last three numbers of the event identifier (EID) specified in the GTRACE macro. See Event Identifiers (EIDs) for USR trace records for a list of the EIDs and associated products for user trace records.
DCB
Data control block.
WKAREA1
Volume labels, file labels, DSCBs or message area. See z/OS DFSMS Using Magnetic Tapes.
WKAREA2
Job file control block.
WKAREA3
Internal control blocks for Open/Close/EOV. These blocks are the data control block (DCB), data extent block (DEB), and the input/output block (IOB).
WKAREA4
WKAREA5
Where-to-go-table used in transferring control among CSECTs of Open/Close/EOV.