TNS Database Error Messages TNS-01178: Trace Level is 0. Trace file/directory unchanged October 29, 2020 mpbod TNS-01178: Trace Level is 0. Trace file/directory unchanged Cause: Trace Level needs to be set for changing the trace file/directory. Action: Use the command set trc_level ON to set the trace level. 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)