doctrine2/lib/Doctrine/ORM/NoResultException.php

<?php

namespace Doctrine\ORM;

/**
 * Exception thrown when an ORM query unexpectedly does not return any results.
 * 
 * @author robo
 * @since 2.0
 */
class NoResultException extends ORMException
{
    public function __construct()
    {
        parent::__construct('No result was found for query although at least one row was expected.');
    }
}