: Check your current version using $ORACLE_HOME/OPatch/opatch version . If it’s older than the version specified in the patch README, download the latest OPatch (Patch 6880880) from My Oracle Support and replace your current directory. 2. Active Processes Locking Binaries
When you face "OPatch failed with error code 21," follow this linear workflow:
If the error occurs during the relinking phase, try relinking manually before reapplying the patch: