IBM SC33-1683-02 - Manual (Page 168)

‘EIBRCODE’. For details of EIB return codes, refer to the CICS
Application Programming Reference manual.
UEPRESP
Address of a 4-byte binary copy of the EIB response code
‘EIBRESP’.
UEPRESP2
Address of a 4-byte binary copy of the EIB response code
‘EIBRESP2’.
UEPTSTOK
Address of a 4-byte token that is valid throughout the life of a task.
See “Using the task token UEPTSTOK” on page 145.
UEPRECUR
Address of a halfword recursion counter. The counter is set to 0
when the exit is first invoked, and is incremented for each recursive
call.
UEPRSRCE
Address of an 8-character copy of the EIB resource value,
EIBRSRCE.
Return codes
UERCNORM
Continue processing.
UERCPURG
Task purged during XPI call.
XPI calls
All can be used.
Although the exit permits the use of XPI GETMAIN and FREEMAIN calls,
you are recommended to use the EXEC CICS GETMAIN and FREEMAIN
commands instead.
API and SPI commands
All can be used.
Note: Take care when issuing recursive commands. For example, you must avoid
entering a loop when issuing an interval control request from the XICEREQC
exit. Use of the recursion counter UEPRECUR is recommended.
interval control EXEC interface program exits
136 CICS TS for OS/390: CICS Customization Guide