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DFHAM4892 when installing new connection definition in CICS



When entering CEDA INSTALL GROUP(group) that contains a new MRO connection and session pair, you receive message DFHAM4892 W Install for group has completed with errors. The CEDA screen displays S Install for xxx failed. Duplicate session- or modegroup-name for connection MROx. You are already using MRO in the CICS Transaction Server for z/OS (CICS TS) region.


DFHAM4892W Install for group has completed with errors.


The new definition contained a new connection name, but the same send and receive prefix as in an existing definition. CICS will not install a resource that is already installed as part of another connection.

If the changes had been made to the ORIGINAL definition, then CICS would have allowed the re-install, as the original connection is being replaced.

Resolving The Problem

To delete the original definition and then install the new definition while CICS is running:

  1. Enter CEMT SET IRC CLOSED to close IRC (or use the Regions operations view in the CICS Explorer)

  2. Enter CEMT SET CONNECTION(old-connection) OUT to put the original connection out of service (or use the ISC/MRO connections operations view in the CICS Explorer)

  3. Enter CEMT DISCARD CONNECTION(old-connection-name) to delete the original definition (or use the ISC/MRO connections operations view in the CICS Explorer)

  4. Enter CEDA INSTALL GROUP(new-groupname) to install the new connection and session pair

  5. Enter CEMT SET IRC OPEN to open IRC

[{"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Component":"Resource Definition","Platform":[{"code":"PF035","label":"z\/OS"}],"Version":"5.1;4.2;4.1;3.2;3.1","Edition":"","Line of Business":{"code":"LOB35","label":"Mainframe SW"}}]

Product Synonym

CICS/TS CICS TS CICS Transaction Server

Document Information

Modified date:
15 June 2018