IBM SC33-1683-02 - Manual (Page 244)

Exit XICTENF
When invoked
By the interval control program when the terminal that an EXEC CICS
START command requires is unknown in this system. The exit program is
expected to give a return code indicating whether the terminal exists on
another connected CICS system and, if so, on which one.
Exit-specific parameters
UEPICEVT
Address of 2 bytes containing the type of request. The equated
values of the types are:
UEPICESD
START command with data
UEPICES
START command without data.
UEPICTR
Address of 1 byte containing an indication of whether the task
issuing the START command was started by transaction routing.
The equated values are:
UEPICTY
A START command was being processed and the task
issuing the command was transaction routed to.
UEPICTN
A START command was not being processed or a START
command was being processed but the task issuing the
command was not transaction routed to.
UEPICFS
Address of 1 byte containing an indication of whether the START
command was function shipped. The equated values are:
UEPICFY
A START command was being processed and the START
was function shipped.
UEPICFN
A START command was not being processed or a START
was being processed but it was not function shipped.
UEPICTRN
Address of 4 bytes containing the name of the transaction to be
run.
UEPICRTR
Address of 4 bytes containing the name of the terminal on which
the transaction should run.
UEPICCTR
Address of 4 bytes containing, for START commands, the name of
the current terminal if the command was transaction routed, or the
name of the session if the command was function shipped.
For other START commands, the field pointed to contains blanks.
terminal not known condition exits
212 CICS TS for OS/390: CICS Customization Guide