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DFHZC3434 Unbind received while session still active on a CICS to IMS LU61 connection

Question & Answer


Question

Why is the session on a CICS to IMS LU61 connection ended by IMS as soon as it is started? I receive these two messages in my CICS Transaction Server for z/OS (CICS TS) region, one right after the other:

DFHZC3461 session started. ((2) Module name: DFHZOPX)
DFHZC3434 Unbind received while session still active. ((3) Module name: DFHZSCX)

Answer

If you are setting up a new connection between CICS and IMS, you have to define every session to both sides.

  • CICS defines each session in a SESSIONS definition.

  • IMS defines each session in a VTAMPOOL SUBPOOL pair.

  • The CICS NETNAMEQ option is the same as the IMS SUBPOOL NAME.

See Defining CICS-to-IMS LUTYPE6.1 links in the CICS Transaction Server documentation for details on how to set the sessions up.

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"Platform":[{"code":"PF035","label":"z\/OS"}],"Component":"LU62","Version":"","Line of Business":{"code":"LOB35","label":"Mainframe SW"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPH2","label":"IBM Information Management System (IMS)"},"Platform":[{"code":"PF035","label":"z\/OS"}],"Line of Business":{"code":"LOB35","label":"Mainframe SW"}}]

Product Synonym

CICS/TS CICSTS CICS TS CICS Transaction Server

Document Information

Modified date:
23 March 2020

UID

dwa1366755

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