When you upgrade to CICS® Transaction Server for z/OS®, Version 5 Release 2, note these changes to the installation process.
You can install this release of CICS Transaction Server using the SMP/E RECEIVE, APPLY, and ACCEPT commands. Use the SMP/E dialogs to complete the SMP/E installation steps. The process meets IBM® Corporate Standards and might be familiar to you if you have installed other z/OS products.
The DFHISTAR process is still available if you prefer this method for installing CICS Transaction Server.
You must install the activation module.
For more information, see Installing the CICS TS activation module.
For information about all the processes for installing CICS Transaction Server, see Installing.
Authorization routines
In z/OS,
do not install SVCs or PC routines that return control to their caller
in any authorized mode: that is, in supervisor state, system PSW key,
or APF-authorized. Such action contravenes the 
z/OS Statement
of Integrity.
If you invoke such services from CICS, you might compromise your system integrity, and IBM Service will not resolve any resulting problems.
