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OPatch : Rollback of Windows BP using OPatch generates errors- ‘Malformed \uxxxx encoding.’ (Doc ID 2309919.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version and later
Microsoft Windows x64 (64-bit)


 Rollback of Windows BP using OPatch generates the below errors

Rolling back patch 26499442…

RollbackSession rolling back interim patch ‘26499442’ from OH ‘C:\app\oracle\product\\dbhome_1’

Restoring “C:\app\oracle\product\\dbhome_1” to the state prior to running NRollback…
OPatch was able to restore your system. Look at log file and timestamp of each file to make sure your system is in the state prior to applying the patch.

NRollback restored the home. Please check your ORACLE_HOME to make sure:
– files are restored properly.
– binaries are re-linked correctly.
(use restore.[sh,bat] and make.txt (Unix only) as a reference. They are located under

UtilSession failed: RollbackSession failed in system modification phase… ‘Malformed \uxxxx encoding.’
Log file location: C:\app\oracle\product\\dbhome_1\cfgtoollogs\opatch\opatch2017-09-08_10-50-16AM_1.log

OPatch failed with error code = 73




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