There should be uninstall instructions in the patch installation guide. If that doesn't work for you.....i'd open a sev 1 with oracle support....assuming this is a production system? ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of DBA Deepak Sent: Thursday, March 15, 2007 12:41 PM To: oracle-l@xxxxxxxxxxxxx Subject: Wrong Patch (Urgent) Hi Gurus, Am in deep trouble hope you will help. My OS is SOLARIS 64 bit My Oracle Version is : 18.104.22.168 32 bit By mistake one of the DBAs installed 64bit patch set ( 22.214.171.124 <http://126.96.36.199> ) on the DB. Therefore linking is failing. Please let me know how can I get arround of this issue without reinstalling the Database s/w. Can I install 32 bit patch (188.8.131.52 ) on the present installation. What is the procedure to check whether the DB s/w is 64/32 bit when the DB is down? Please help. Regards, Deepak Oracle DBA CONFIDENTIALITY NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by email reply.