TNS Database Error Messages TNS-12645: Parameter does not exist December 17, 2020 mpbod TNS-12645: Parameter does not exist Cause: A SQLNET.ORA parameter from which a value was needed does not exist. Action: Set the parameter in the parameter file. Back to previous menu https://support.oracle.com/ http://www.oracle.com/ Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)