Neil, Wallace, I created an ASP.NET client (instead of SL4) and attempted to upload 7MB and I get this stack of exceptions:
♦ CommunicationException: An error occurred while receiving the HTTP response to http://localhost/xxxxservice/Aggregation.svc. This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details. ♦ WebException: The underlying connection was closed: An unexpected error occurred on a receive. ♦ IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ♦ SocketException: An existing connection was forcibly closed by the remote host There is no extra useful information in there. So I'm going to give up flogging this dead horse and change the service method to use streaming. I found a sample in one of my books that matches Wallace's comments about transferMode="Streamed". I'll run a few experiments. It's a good technique to known anyway and it will remove any hidden limits in this app. Cheers, Greg
