Weblogic Server error OPatch failed with error code 255

Weblogic Server error OPatch failed with error code 255 If you get following error when attempting to list patches using opatch then try this solution. Note that I faced this error for Weblogic Server 12.2.1.3 after executing opatch lsinventory command. OPatch failed with error code 255 Solution: Most likely issue is due to JAVA and JRE path. If you are using Linux then export following two path and try again running opatch. export JAVA_HOME= export ORACLE_HOME= Please let me know if this helps you.