259 is a standard windows error code that indicates no more data is available.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms681381(v=vs.85).aspx
If you look on the client for the profile deployment you will see a folder under c:\program files (x86)\landesk\uma. In the uma directory there is a logs folder that will contain more detail. In the root of the uma folder there is also a couple of log files that will be useful.