Action to Take if a WebLogic Server 12c PSU Conflicts with Previous PSU Installed in Same Oracle Home

(Doc ID 2355807.1)

Last updated on FEBRUARY 15, 2018

Applies to:

Oracle WebLogic Server - Version 12.1.2.0.0 and later
Information in this document applies to any platform.

Symptoms

Starting with Oracle Weblogic Server 12c 12.1.2,  OPatch is the utility used to apply and rollback one-off patches and Patch Set Updates (PSU).

When applying a PSU, the following error is reported where AAAAAAA is a previous PSU and BBBBBBB is the current or newer PSU:

11:28:09 AM oracle.sysman.oii.oiii.OiiiInstallAreaControl initAreaControl
INFO: Install area Control created with access level 0
Applying interim patch 'BBBBBB' to OH '/opt/Oracle/Middleware_12_1.3'
Verifying environment and performing prerequisite checks...

Patch [ BBBBBBb] conflict with patch(es) [ AAAAAAa ] in the Oracle Home.

To resolve patch conflicts please contact Oracle Support Services.
If you continue, patch(es) [ AAAAAA ] will be rolled back and the new Patch [ BBBBBBB ] will be installed.

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Cause

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