Error Number: 1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '`NULL` AND `right` < `IS` `NULL` AND `start` = 1 ORDER BY `left` ASC' at line 3

SELECT `id` FROM `dr_1_news_category` WHERE `left` > `IS` `NULL` AND `right` < `IS` `NULL` AND `start` = 1 ORDER BY `left` ASC

Filename: libraries/LeftRight.php

Line Number: 43