ORA Database Error Messages ORA-12564: TNS:connection refused August 6, 2015 mpbod ORA-12564: TNS:connection refused Cause: The connect request was denied by the remote user (or TNS software). Action: Not normally visible to the user. For further details, turn on tracing and reexecute the operation. 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)