TNS Database Error Messages TNS-12600: TNS: string open failed December 17, 2020 mpbod TNS-12600: TNS: string open failed Cause: The creation of a string in Oracle NLS format failed. This is an internal error. Action: Enable tracing and attempt to repeat the error. If it occurs again, contact Oracle Support Services. 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)