Sudden Database Error

[Melissa Miller]

I have not installed anything recently and have been using my forum normally.

All the sudden when ANYONE clicks on a forum thread there is a database error. They dont get to the thread, and I get an email. PLEASE help!
It was working normally this afternoon, then tonight I start getting a ton of emails and cant click on any thread.

This has shut down my forum in most ways, as no one can read a thread, it takes them to the database error message page. It doesnt matter who it is, or what thread it is.

Here is the error message:

Database error in vBulletin 3.6.0:

Invalid SQL:

SELECT
post.*, post.username AS postusername, post.ipaddress AS ip, IF(post.visible = 2, 1, 0) AS isdeleted,
user.*, userfield.*, usertextfield.*,
icon.title as icontitle, icon.iconpath,
avatar.avatarpath, NOT ISNULL(customavatar.userid) AS hascustomavatar, customavatar.dateline AS avatardateline,customavatar.width AS avwidth,customavatar.height AS avheight,

editlog.userid AS edit_userid, editlog.username AS edit_username, editlog.dateline AS edit_dateline,
editlog.reason AS edit_reason,
postparsed.pagetext_html, postparsed.hasimages,
sigparsed.signatureparsed, sigparsed.hasimages AS sighasimages,
sigpic.userid AS sigpic, sigpic.dateline AS sigpicdateline, sigpic.width AS sigpicwidth, sigpic.height AS sigpicheight,
IF(displaygroupid=0, user.usergroupid, displaygroupid) AS displaygroupid, infractiongroupid

, journals.journaldesc, journals.journal_id
FROM post AS post
LEFT JOIN user AS user ON(user.userid = post.userid)
LEFT JOIN userfield AS userfield ON(userfield.userid = user.userid)
LEFT JOIN usertextfield AS usertextfield ON(usertextfield.userid = user.userid)
LEFT JOIN icon AS icon ON(icon.iconid = post.iconid)
LEFT JOIN avatar AS avatar ON(avatar.avatarid = user.avatarid) LEFT JOIN customavatar AS customavatar ON(customavatar.userid = user.userid)

LEFT JOIN editlog AS editlog ON(editlog.postid = post.postid)
LEFT JOIN postparsed AS postparsed ON(postparsed.postid = post.postid AND postparsed.styleid = 2 AND postparsed.languageid = 1)
LEFT JOIN sigparsed AS sigparsed ON(sigparsed.userid = user.userid AND sigparsed.styleid = 2 AND sigparsed.languageid = 1)
LEFT JOIN sigpic AS sigpic ON(sigpic.userid = post.userid)
LEFT JOIN journals AS journals ON (journals.journalist_id=post.userid)
WHERE post.postid IN (0,1149,1151,1152,1153,1154,1155,1156,1157,1160)
ORDER BY post.dateline;

MySQL Error : Can't create/write to file '/tmp/#sql_918f_0.MYI' (Errcode: 13)
Error Number : 1
Date : Sunday, November 5th 2006 @ 01:30:13 AM
Script : http://www.havaneseforum.com/showthread.php?t=172
Referrer : http://www.havaneseforum.com/index.php
IP Address : 72.178.115.170
Username : Unregistered
Classname : vb_database