// For custom searches, use the contactIDs method
if (is_a($this, 'CRM_Contact_Selector_Custom')) {
$sql = $this->_search->contactIDs($start, $end, $sort, TRUE);
// For custom searches, use the contactIDs method
if (is_a($this, 'CRM_Contact_Selector_Custom')) {
$sql = $this->_search->contactIDs($start, $end, $sort, TRUE);