TNS Database Error Messages TNS-00138: Failed to find ORACLE executable directory October 1, 2020 mpbod TNS-00138: Failed to find ORACLE executable directory Cause: The Oracle environment is not correctly set. Action: Ensure that the Oracle environment is correctly set and the error messages file is in the correct place. 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)