For the latest information on upgrading to and from any versions of CICS TS, see CICS TS V5.6.

Changes to CICS externals

CICS® externals, such as resource definitions and programming interfaces, have changed to support the changes in function for this CICS release. Read these topics to check which changes might affect your system.

Subtopics

Changes to installation procedures
When you upgrade to CICS Transaction Server for z/OS, Version 5 Release 2, note these changes to the installation process.
Changes to system initialization parameters
In CICS Transaction Server for z/OS, Version 5 Release 2, new system initialization parameters are available, and you might find that some system initialization parameters that you used previously are now obsolete. Also, the scope, default, or range of possible values for some existing system initialization parameters has changed. You might need to make changes to your system initialization table or your CICS startup JCL because of these changes.
Changes to the application programming interface
CICS Transaction Server for z/OS, Version 5 Release 2 includes some new API commands to support new CICS functions, and some existing commands have changes to options and error conditions.
Changes to the JCICS application programming interface
The JCICS application programming interface has new methods and other new elements to provide Java™ support for some of the new functions available through the EXEC CICS application programming interface.
Changes to resource definitions
Changes to the resource definitions available in CICS relate to new, changed, or obsolete CICS functions. The changes might involve complete resource definitions or individual attributes. The resource definitions supplied by CICS have corresponding changes, which you can implement by running the UPGRADE function of the CSD utility program (DFHCSDUP).
Changes to the system programming interface
CICS Transaction Server for z/OS, Version 5 Release 2 has some new SPI commands to control new system resources, and some existing commands have new options, or new values for existing options. Some system programming commands, options, or values are now obsolete because they relate to obsolete CICS functions.
Changes to CEMT
The commands available in the CEMT transaction have been modified to reflect changes to resource definitions and new functions.
Changes to the CICS management client interface (CMCI)
The CICS management client interface (CMCI) supports additional CICSPlex® SM and CICS resources, and you can query the resources using external resource names.
Changes to the CICS-supplied transactions
Some CICS-supplied transactions are new, or have changed to support new functions.
Changes to global user exits and task-related user exits
CICS Transaction Server for z/OS, Version 5 Release 2 has changes to some existing global user exit programs and task-related user exit programs. Check your existing global user exit programs against the changes summarized here.
Changes to the exit programming interface
CICS Transaction Server for z/OS, Version 5 Release 2 has changes to some existing programming interface. Check your existing global user exit programs against the changes summarized here.
Changes to user-replaceable programs
Reassemble all user-replaceable programs, checking whether any changes to the user-replaceable program interface affect your own customized programs.
Changes to CICS utilities
Changes to CICS utilities in CICS Transaction Server for z/OS, Version 5 Release 2 relate to new, changed, or obsolete CICS functions. The existing utility programs DFHCSDUP, DFHSTUP, and DFH0STAT support new resources. The trace formatting utility program DFHTUxxx and IPCS dump exit routine DFHPDxxx support new resources and are renamed for the release.
Changes to monitoring
Changes to CICS monitoring data might affect user-written and vendor-written utilities that analyze and print CICS SMF 110 monitoring records.
Changes to statistics
CICS statistics records contain changes because of new domains or because of enhancements to CICS. Statistics types are added or removed and some statistics types have new or changed fields. You must recompile application programs using the changed DSECTs.
Changes to sample programs
In each CICS release, check for changes to the samples provided to demonstrate the use of different CICS functions. New samples might be provided and existing samples modified or withdrawn. If you have custom programs or other items based on the samples, update them to reflect changes in the samples. Unless otherwise stated, sample programs are supplied in the SDFHSAMP library.
Changes to problem determination
CICS provides information to help you diagnose problems relating to new functions.
Changes to security
When you upgrade to CICS Transaction Server for z/OS, Version 5 Release 2, note these changes to security.

Parent topic: Upgrading from Version 4 Release 2

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Last updated: Saturday, 15 June 2019