IBM SC33-1683-02 - Manual (Page 242)

Exit-specific parameters
UEPALEVT
Address of 2 bytes containing the type of request. The equated
values of the types are:
UEPALESD
START command with data
UEPALES
START command without data
UEPALETD
Transient data trigger level reached.
UEPALTR
Address of 1 byte containing an indication of whether the task
issuing the START command was started by transaction routing.
The equated values are:
UEPALTY
A START command was being processed and the task
issuing the command was transaction routed to.
UEPALTN
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.
UEPALFS
Address of 1 byte containing an indication of whether the START
command was function shipped. The equated values are:
UEPALFY
A START command was being processed and the START
was function shipped.
UEPALFN
A START command was not being processed or a START
was being processed but it was not function shipped.
UEPALTRN
Address of 4 bytes containing the name of the transaction to be
run.
UEPALRTR
Address of 4 bytes containing the name of the terminal on which
the transaction should run. (If a transient data trigger level was
reached and the transient data queue definition specified a system,
then this would contain a system identifier.)
UEPALCTR
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 and for transient data trigger events,
the field pointed to contains blanks.
UEPALNTI
Address of 8 bytes containing, for function-shipped START
commands, the netname of the last system from which the request
came.
terminal not known condition exits
210 CICS TS for OS/390: CICS Customization Guide