TNS Database Error Messages TNS-12620: TNS:requested characteristic not available December 17, 2020 mpbod TNS-12620: TNS:requested characteristic not available Cause: The connect request failed because a requested transport characteristic could not be supported by the remote TNS software. Action: If appropriate, re-execute with reduced requirements. 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)