I think it's a known, documented issue that the rootpre.sh doesn't exist with the AIX patchsets even though you are instructed to run it. The answer we were given from support was that it doesn't really need to be run again since it should have been executed already at install time. If you search Metalink for "rootpre.sh AIX", you'll get some hits with the details. I'm not sure what to do about your missing ORACLE_HOME though. I don't know where the OUI looks for those, but I'd guess it's either /etc/oratab or maybe somewhere in the oraInventory directory. Regards, Brandon ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Bryan Wells I am attempting to upgrade Oracle from 18.104.22.168 to 22.214.171.124 on AIX-64bit IBM P570. 1.) rootpre.sh cannot be found in the downloaded patchset. 2.)after using rootpre.sh from another home, installer will not recognize the Oracle Home i am attempting to upgrade. Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it.