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OPatch Error "Backup libraries to be regenerated failed with error message null" When Applying WebLogic Server PSU (Doc ID 2324404.1)

Last updated on NOVEMBER 14, 2022

Applies to:

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


On WebLogic Server 12c, using the OPatch utility to apply a Patch Set Update (PSU), when an error occurs:

Backup libraries to be regenerated failed with error message "null"

OPatch logs with full error stack:



- It appears that the patch is in fact being applied to the server.

- This problem only occurs on Windows and cannot be reproduced on Linux.

- The problem occurs only when a previous PSU is in place before the new PSU is applied.


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