Using $this when not in object context

[Error] 
Using $this when not in object context (0)
/srv/www/inetme.ru/htdocs/bitrix/modules/iblock/classes/mysql/iblockelement.php:577
#0: CIBlockElement::GetList(array, array, boolean, boolean, array)
   /srv/www/beeline-provider.ru/htdocs/index.php:145