Final error: 0xe00084f8 - The network connection to the Backup Exec Remote Agent has been lost. Check for network errors. Final error category: Resource Errors

Hello people

am backing up a total of 900GB of data to tape.

when it backup's a total of 23GB it stops and gives the following error

Final error: 0xe00084f8 - The network connection to the Backup Exec Remote Agent has been lost. Check for network errors. Final error category: Resource Errors

how can i trouble shoot this?