event-editor.php line 47:

    <?php echo $EM_Notices;
    $message =  $_SESSION['EM_Success'];
    echo $message;

    add_action('wp_footer','remove_status');
    function remove_status()
    {
        if($_POST['event_name'] == null)
            {
                $_SESSION['EM_Success'] = '';
            }
    }

    ?>
em-event line 404:

    $this->feedback_message = __ ( 'New recurrent event inserted!', 'dbem' );
                    return apply_filters('em_event_save', true, $this);
                    $_SESSION['EM_Success'] = 'New recurrent event inserted!';
                }
                //Successful individual save
                $this->feedback_message = __ ( 'New event successfully inserted!', 'dbem' );
                $_SESSION['EM_Success'] = 'New event successfully inserted!';