ORA Database Error Messages ORA-12721: operation cannot execute when other sessions are active August 11, 2015 mpbod ORA-12721: operation cannot execute when other sessions are active Cause: This command can only be run when there are no other sessions active Action: Ensure there are no other connections to the database 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)