Mensaje de error

Notice: Undefined index: und em include() (linha 20 de /mnt/arquivos/html/rets/sites/all/themes/corolla/templates/node--noticias.tpl.php).
Warning: date_timezone_set() expects parameter 1 to be DateTime, boolean given em format_date() (linha 2133 de /mnt/arquivos/html/rets/includes/common.inc).
Warning: date_format() expects parameter 1 to be DateTimeInterface, boolean given em format_date() (linha 2143 de /mnt/arquivos/html/rets/includes/common.inc).