Overcome “ERROR: ‘${ORACLE_HOME}/agent11g’ subdirectory already exists in Oracle Inventory. Specify another home location.” when doing a silent install in a non-empty Oracle home.

While testing our silent Oracle Grid agents installs I ran into error below when (re-)installing into a non-empty Oracle home directory. $ ./runInstaller -silent -responseFile /home/oracle/additional_agent.rsp -invPtrLoc /var/opt/oracle/oraInst.loc . . ERROR: Error:"${ORACLE_HOME}/agent11g" subdirectory already exists in Oracle Inventory. Specify another home location. . . This error can easily be overcome by manually editting the ‘inventory.xml […]

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