TNS Database Error Messages TNS-12642: No session key December 17, 2020 mpbod TNS-12642: No session key Cause: A process has no session key associated with it because the authentication service being used does not use one. Action: If a session key is required, use another authentication service. 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)