Environment:
Windows forms web services client tested on Vista Ultimate x64 and Windows XP (Virtual PC)
WSE 2.0 SP 3 using DIME attachments

I get the error below when trying to receive an attachment in a response that causes the response to exceed 10 megabytes (approximate). I do not have control of the web service server. It is an interface with the IRS MeF (Modern eFile) System. I am able to successfully receive messages in the 9.5 mb range but when the message exceeds 10 mb, I receive the error. Based on timing tests that I performed, it looks like the entire response is being received but the process errors before completing the processing of the response. The trace of the web service does not record the response in the trace file. There are no problems with the XML with smaller (less than 10mb) responses. The responses themselves, without the attachments, are about 2.5 kb.

I have the following WSE 2.0 configuration parameters:

<messaging>
<executionTimeout value="600"/>
<maxRequestLength>-1</maxRequestLength>
</messaging>

The response takes less than two minutes for the successful 9.5 mb response. The error occurs in less than two minutes for a 10.5 mb attachment. The error occurs at around two minutes fify seconds for an 18 mb attachment.

Thanks - Rich F.

Exception: System.InvalidOperationException: Response is not well-formed XML. ---> System.Xml.XmlException: Root element is missing.
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.ThrowWithoutLineInfo(String res)
at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
at System.Xml.XmlTextReaderImpl.Read()
at System.Xml.XmlTextReader.Read()
at Microsoft.Web.Services2.Xml.XmlSkipDTDReader.Read()
at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)
at System.Xml.XmlDocument.Load(XmlReader reader)
at Microsoft.Web.Services2.SoapEnvelope.Load(Stream stream)
at Microsoft.Web.Services2.Messaging.SoapDimeFormatter.Microsoft.Web.Services2.Messaging.ISoapFormatter.Deserialize(Stream stream)
at Microsoft.Web.Services2.InputStream.GetRawContent()
at Microsoft.Web.Services2.InputStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.StreamReader.ReadBuffer(Char[] userBuffer, Int32 userOffset, Int32 desiredChars, Boolean& readToUserBuffer)
at System.IO.StreamReader.Read(Char[] buffer, Int32 index, Int32 count)
at System.Xml.XmlTextReaderImpl.ReadData()
at System.Xml.XmlTextReaderImpl.InitTextReaderInput(String baseUriStr, TextReader input)
at System.Xml.XmlTextReaderImpl..ctor(String url, TextReader input, XmlNameTable nt)
at System.Xml.XmlTextReaderImpl..ctor(TextReader input)
at System.Xml.XmlTextReader..ctor(TextReader input)
at System.Web.Services.Protocols.SoapHttpClientProtocol.GetReaderForMessage(SoapClientMessage message, Int32 bufferSize)
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
--- End of inner exception stack trace ---
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at IRSProxiesSA.StateService.GetSubmissionsClass.GetSubmissions(GetSubmissionsRequestType GetSubmissionsRequestArgs) in D:\Form990Development\Form990Software\IRSProxiesSA\StateService.cs:line 76
at IRSWebSupportSA.State.GetSubmissions(GetSubmissionsRequestType Request) in D:\Form990Development\Form990Software\IRSWebSupportSA\State.cs:line 196