Admin Settings : Fatal error

Fatal error: Call to undefined function setSearchStartAge() in /home1/XxxxX/public_html/inc/classes/BxDolAdminSettings.php(104) : runtime-created function on line 1

$oFunction = create_function('$arg0', $aItem['check']);
if(!$oFunction($aData[$aItem['name']])) {
$this->_iCategoryActive = (int)$mixedCategory;
return MsgBox("'" . $aItem['title'] .  "' " . $aItem['check_error'], $this->_iResultTimer);
}