We keep receiving this error from many of our different clients:

sort start at   : Fri Sep 18 04:22:00 2009
Error: 22: SortPOListFile: source file 'C:\\PROGRA~1\\Symantec\\NetBackup PureDisk Agent\\var\\srd\\98\\current\\SnapshotPOList.po' does not contain a valid PO list: the line @POformatVersion=1.0 is missing.
*** Error Message ***

Anyone know what that is and how to fix that?