admin backup problem

Ok, here is the issue i am having and i just cant for the life of me work it out.

I had 1 server, all setup and backups worked perfect, then time to upgrade, so needed to move servers. i ran admin backup's, copied them to new server, and then restored them to new server. all good, working and up and running, but now if i run an admin backup, it comes back with this error for each user account that has a database, and for each database.

Error while backing up database XXXX_DB1
Error while backing up database XXXX_DB1: The sql file is 0 bytes in size: /home/admin/admin_backups/XXXXX/backup/XXXX_DB1.sql
mysqldump error output: mysqldump: ambiguous option '--all' (all-databases, allow-keywords)

Click to expand...

any help of sovling this would be great.

Regards

Have you a different mysql version from previous server?

Regards

old server - MySQL 5.5.21
new server - MySQL 5.5.27


Thanks

Try repair all databases:


Regards

i had already done repairs on a few of the DB's, but ran that, still the same