IBM SC33-1683-02 - Manual (Page 138)

Exit XFCNREC
When invoked
Before file open when a mismatch is detected between the backout
recovery setting for the file and its associated non-RLS data set.
Exit-specific parameters
UEFILE
Address of the 8-bit file name. If the file name is less than 8
characters in length, it will be padded with blanks.
UEDSETN
Address of the 44-byte base data set name. If the data set name is
less than 44 characters in length, it will be padded with blanks.
UEPFRCV
Address of a 1-byte field containing the backout recovery setting for
the file, as specified in the FILE definition. The possible value is:
UEPFLOG
Backout logging specified.
If RECOV(NONE) is specified in the FILE definition, the addressed
field contains hexadecimal zeros.
Note: In releases of CICS before 4.1, UEDSETN was called UEDSNAME,
and UEPFLOG was called UEFBCLOG. If you are migrating exit
programs from CICS/ESA 3.3 or earlier to CICS Transaction Server
for OS/390 Release 3, all references to these parameters must be
changed.
Return codes
UERCNORM
Fail open as normal.
UERCBYP
Bypass open failure—accept mismatch.
XPI calls
Must not be used.
SPI calls
Must not be used.
API and SPI calls
Must not be used.
file control open/close program exit
106 CICS TS for OS/390: CICS Customization Guide