what could be the cause of the blank page?
i tried changing the var to mysql also.
is there any way to log the error?

Check your server error logs. If you don't know where they are, ask your host.

Hi,
When I download an sql my forum does not work :(
https://vborg.vbsupport.ru/external/2014/10/1.jpg
what is the problem?
Thank you ;)

any solution?

You would have to leave us more details on what you did. How did you restore the database? What was the reason you had to restore your database from a backup?

:)

I did a back up of my forum , before manipulating into the template, but i was not happy with the modification, and decided to restore the forum.
I have tried directly via phpmyadmin but it does not work properly , then I have used bigdump to do it.
All the table are in the database.

https://vborg.vbsupport.ru/external/2014/11/20.jpg

Thank you :)

Well this backs up only the database, not the files.

What do you mean it did not work? Do you have ssh access?

Hi, I'm still confused about the date format and directory of the backups.. Could anyone help? I want mine to backup daily and have the backups stored in public_html/backups

Thanks!

Hi. This has been working fine until a few days ago.When trying to do backups now i get this error in admincp

Database error in vBulletin 4.2.2:

Invalid SQL:
OPTIMIZE TABLE `filedata`;

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Friday, January 2nd 2015 @ 05:54:35 AM
Error Date : Friday, January 2nd 2015 @ 05:55:08 AM
Script : http://www.xxxxxxxxxxx.com/admincp/c...cron&cronid=95
Referrer : http://www.xxxxxxxxxxxx.com/admincp/....php?do=modify
IP Address : xx.x.xxx.xx
Username : xxxxxxx
Classname : vB_Database
MySQL Version :

Any idea what this is and how to fix it pls

Seems pretty straightforward - the database server was down when you tried to backup. Restart it.
On my linux server this is something like /etc/rc.d/init.d/mysqld restart.
Check logs to see if there's any clue why it was down. Maybe your server overloaded? If so, upgrade to one with more RAM or better IO. VB4 really needs 2GB RAM for a largish forum.