CICS- and CICSPlex SM-supplied modules required in the MVS linklist

CICS® TS supplies the modules listed in the SDFHLINK and SEYULINK libraries when you install CICS TS.

The following CICS modules are in SDFHLINK:

AMDUSREF: Alias of DFHTG750.
AXMSC: AXM server connection routines for CICS data-sharing servers.
AXMSI: AXM subsystem initialization routine for CICS data-sharing servers.
DFHGTCNV: Subroutine used by LOGR subsystem interface.
DFHHCADD: CICS Health Checker CSZADDCHECK exit routine.
DFHHCCHK: CICS Health Checker.
DFHHZMGT: CICS Health Checker messages.
DFHLGCNV: Exit routine for LOGR subsystem interface.
DFHMVRMS: General MVS™ RESMGR exit stub.
DFHNCIF: Named counter server interface.
DFHNCOPT: Named counter server options.
DFHPD750: Dump formatting routine for use with IPCS.
DFHRPDUF: System dump formatting routine for ONC RPC.
DFHRPTRI: Trace interpretation routine for ONC RPC.
DFHRXSVC: RRS domain authorized services.
DFHSNNFY: RACF® CICS segment changes notification routine.
DFHSNPTO: CICS RACF dynamic parse TIMEOUT keyword print routine.
DFHSNVCL: CICS RACF dynamic parse OPCLASS validation routine.
DFHSNVID: CICS RACF dynamic parse OPIDENT validation routine.
DFHSNVPR: CICS RACF dynamic parse OPPTRY validation routine.
DFHSNVTO: CICS RACF dynamic parse TIMEOUT validation routine.
DFHSSIN: CICS subsystem that initializes the console message handling facilities.
DFHSSMGT: CICS subsystem message table that contains the text of messages for the subsystem interface modules.
DFHTG750: Link module for the CICS GTF trace printing load module DFHTRGTF.
DFHTR750: Link module for the CICS GTF trace printing load module DFHTR750.
DFHTT750: Link module used for trace interpretation. You do not have to include DFHTT750 in the MVS linklist. If it is not in the linklist, an APF authorized library in the STEPLIB concatenation of the batch job is required for every job that uses the module.
DFHXCSVC: External CICS interface (EXCI) SVC services routine.

The following CICSPlex® SM modules are in SEYULINK:

EYU9D620: Dump formatting routine for use with IPCS.
EYU9X620: In each MVS image that contains a CMAS. EYU9X620 is the initialization module for the ESSS.
EYU9A620: In each MVS image that contains a CMAS where you want to run the CICSPlex SM API. EYU9A620 is the CICSPlex SM API subtask module.
EYU9T620: CICSPlex SM to Tivoli® NetView® Communications module.

These modules are supplied in an APF-authorized library in the MVS linklist because of the following reasons:

Non-CICS regions such as batch jobs or a CICS data sharing server can require them.
They must be consistent across several CICS regions.
Both CICS and non-CICS regions can require them.
The Security Administrator who runs the ADDUSER or ALTUSER commands under TSO requires the RACF dynamic parse routines. For information about the RACF interface routines, see the An overview of the CICSPlex SM ESM interface.

Ensure the modules supplied in SDFHLINK and SEYULINK are available from an APF-authorized library in the MVS linklist:

Add these modules, as required, to an existing APF-authorized library defined in the MVS linklist
or
Define SDFHLINK and SEYULINK as APF-authorized libraries and include them in the MVS linklist

Compatibility with earlier CICS releases

Unless otherwise stated, the CICS Transaction Server for z/OS®, Version 6 Release 2 levels of the modules in SDFHLINK are compatible with earlier releases of CICS. The CICSPlex SM modules in SEYULINK are not compatible with earlier releases. CICSPlex SM modules in SEYULINK are release specific. If you plan to run multiple releases of CICSPlex SM on the same MVS image, you must have the equivalent modules specific to the releases you are running.

DFHPD750, DFHTG750, DFHTR750, and DFHTT750 are release-dependent. If you run more than one release of CICS, ensure that the correct versions are available.