Is it possible to add a new CICS release to the ENFPARM, CICSREL, without recycling ENF?

Document ID : KB000053171
Last Modified Date : 14/02/2018
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This document will explain what is required to institute a change to the ENF control option, CICSREL, when a new CICS release is introduced.


CAIENF/CICS Intercept modules are loaded into CSA or ECSA at CAIENF startup, and reside there until the next IPL. Therefire you must cycle ENF to bring in the new/added release of CICS (via the ENFPARM, CICSREL)

The 'HOOKS' loaded into CSA do not 'UNHOOK' when bringing down ENF. So, the ENFCICS INTERFACE (SECURING YOUR CICS REGIONS) will not get 'UNHOOKED'.

Steps to properly install and interface:

  1. Include the new release within the CICSREL control option defined in the ENFPARM parameter file.
  2. P ENF
  3. S ENF

NOTE: If support for the new release of CICS was not already present, and you needed to apply maintenance to obtain this support, then you will need to pass the REINIT option on the restart of ENF. The proper syntax is: S ENF,,,REINIT.

NOTE: ENF must reference any updated modules from either a STEPLIB or the system LNKLIST. If loading from the system LNKLIST be sure to refresh LLA prior to recycling the ENF address space.