TNS Database Error Messages TNS-00108: TNS_ADMIN not defined September 30, 2020 mpbod TNS-00108: TNS_ADMIN not defined Cause: TNS_ADMIN pointer is not set. Action: Set the TNS_ADMIN pointer before running application. 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)