Unable to create backups

[Basin]

I am recieveing the following error message following upgrading to v 10.0.3.45857 of System Recovery 2011 server edition.  My OS is Windows server 2003 SP2.  My network technicians indicate no problems on the network.  When I start a backup on the server, a backup file is created on my NAS device.  Progress and Performance gets to 5% and never changes until the following message occurs then the file on my NAS device disappears.  

Error EC8F17B7: Cannot create recovery points for job: Daily.

            Error E7D1001F: Unable to write to file.

                        Error EBAB03F1: The specified network name is no longer available.

            Error E7D10046: Unable to set file size.

                        Error EBAB03F1: The specified network name is no longer available. (UMI:V-281-3215-6071)

Details:

Source: Symantec System Recovery

[Markus_Koestler]

Hm, you could try to restart the NAS device and see how it goes after that. Also try to specify the backup destination with \\IPADRESS instead of \\NASNAME.

[Markus_Koestler]

Please update