Netbackup Status/Error Code 57 Troubleshooting ..

Status/Error Code 57. (this error persists if NetBackup client services are hung on the client )
Step 1.
Login on the server which is failing with error code 57.

For windows

Step A.
run->services.msc-->Netbackup client services
Restart Netbackup client services (if they are already started ) or start netbackup servicers if they are stoped .

For linux
pkill -HUP xinetd

For Solaris/AIX/HP-UX
pkill -HUP inetd

Fire backup it will complete successfully .