[Box Backup] Unknown errors

[Torsten]

Hello,
i use BB svn2377 and i have some errors i do not unterstand. So my quesion is, 
what does the following errors mean?

On Backup Server (bbstored):

Exception thrown: BackupStoreException(AddedFileDoesNotVerify) at 
BackupStoreContext.cpp(573)
Exception thrown: ConnectionException(Conn_Protocol_UnknownCommandRecieved) at 
autogen_BackupProtocolServer.cpp(912)


On a different system and different account i see the following on the backup 
client:

Exception thrown: ConnectionException(Conn_Protocol_UnknownCommandRecieved) at 
autogen_BackupProtocolServer.cpp(912)
ERROR: Internal error during backup run: basic_string::substr

thanks a lot
  Torsten