User backup failing for SQL

Hi 

DBA team is running backup via script and its failing with the below error

   C:\Program Files\VERITAS\NetBackup\bin>bpbackup.exe -w -t 13 -L c:\mssql\APEAPPGNK001\admsql\save\log\try.log c:\mssql\APEAPPGNK001\admsql\save\log\s
avedb.log
EXIT STATUS 48: client hostname could not be found
 

We have recently moved this client from mas1 to mas2.

Thou full and incremental backups are succesfull on this client, only user backup are failing. 

What could be the correct and where?