Restore: Maximum size for a backup set was exceeded

Hello,

This is the error I receive when restoring/redirecting all DBs to a different server:

V-79-57344-37958 - The backup of resource was written by a previous version of Backup Exec.  The maximum size for a backup set in that version was exceeded.  To restore the data, disable the 'Use Fast File Restore' feature, and run the restore job again.  For information on how to disable the Use Fast File Restore feature, see http://support.veritas.com/docs/278673

The version of Symantec Backup Exec is 2010 R3.
Fully patched.
Latest agent re-deployed to target server.
Deselected "Use fast file restore".
 

What is the maximum sze limit for a restore?
Is there any configuration change I am missing?

Thanks for your help

Davide