http://developers.de/blogs/damir_dobric/archive/2009/06/05/oneway-operation-style-mismatch.aspxWhen working with service you sometimes may get following error “ The server did not provide a meaningful reply; this might be caused by a contract mismatch, a premature session shutdown or an internal server error.” The good thing is that this errorenCommunityServer 2008 SP1 (Build: 30619.63)