ORA-12535 or TNS-12535 'Connection timed out' Occurs. (Doc ID 1504201.1)

Last updated on APRIL 24, 2017

Applies to:

Access Manager for CICS - Version 9.2 to 10.2
Operating System Dependent Interface - Version 9.2 to 10.2
SQL*Plus - Version 9.2.0.1 to 10.2.0.5 [Release 9.2 to Oracle10g]
Precompilers - Version 9.2 to 10.2
Oracle Database - Enterprise Edition - Version 9.2.0.1 to 10.2.0.5.0 [Release 9.2 to 10.2]
IBM z/OS on System z

Symptoms

Connections from a IBM z/os client to a remote database fail with ORA-12535 or TNS-12535 Connection timed out. The problem can also occur when attempting to use a database link when conneced to an Oracle database on IBM z/os
You have read <Note 119706.1>, but none of the suggested solutions or actions have resolved the problem.

Cause

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