MySQL error in file: /engine/modules/functions.php at line 2001

Error Number: 1

The Error returned was:
Can't create/write to file '/tmp/#sql_cb3_2.MAI' (Errcode: 30 "Read-only file system")

SQL query:

SELECT p.id, p.autor, p.date, p.short_story, CHAR_LENGTH(p.full_story) as full_story, p.xfields, p.title, p.category, p.alt_name, p.comm_num, p.allow_comm, p.fixed, p.tags, e.news_read, e.allow_rate, e.rating, e.vote_num, e.votes, e.view_edit, e.editdate, e.editor, e.reason FROM dle_post p INNER JOIN (SELECT DISTINCT(dle_post_extras_cats.news_id) FROM dle_post_extras_cats WHERE cat_id IN ('1','2','3','4','5','6','8','9','10','11','12','13','14','15','16','17','18','19','20','21','22','23','24','25','26','27','28','29')) c ON (p.id=c.news_id) LEFT JOIN dle_post_extras e ON (p.id=e.news_id) WHERE approve=1 ORDER BY rating DESC LIMIT 0,5