1030 - Got error 28 from storage engine

select distinct s.status, p.products_id, p.products_fsk18, p.products_model, p.products_virtual, pd.products_name, pd.products_short_description, p.products_image, p.products_price, p.products_vpe, p.products_vpe_status, p.products_vpe_value, p.products_tax_class_id, p.products_shippingtime, p.products_date_added from products p left join specials s on p.products_id = s.products_id left join products_description pd on p.products_id = pd.products_id where pd.language_id = '6' and products_status = '1' and (s.status is NULL or s.status = 0) order by pd.products_viewed DESC

[XT SQL Error]