error in connection between a windows application and web service

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Hi,
I have this Error in connection between a windows application and web service:
(in some pc a haven't any problem)
System.InvalidOperationException: Response is not well-formed XML. ---> System.Xml.XmlException: Data at the root level is invalid. Line 1, position 2.
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.Throw(String res, String arg)
at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
at System.Xml.XmlTextReaderImpl.Read()
at System.Xml.XmlTextReader.Read()
at System.Xml.XmlReader.MoveToContent()
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)

Posted 6-Aug-13 20:31pm

abtinC# 2009

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Dennis C. Dietrich · Answer 1 · 2013-08-06T20:37:00

Solution 1

Chances are what you are getting back isn't XML at all. I suggest you install Fiddler[^] to find out what the server is sending back.

Posted 6-Aug-13 20:37pm

Dennis C. Dietrich

Comments

Dholakiya Ankit 7-Aug-13 3:23am

5ed

abtinC# 2009 7-Aug-13 5:44am

Thanks Dennis C.Dietrich
I download fiddler and run in client pc ,error is :
Context-Length mismatch : response Header indicated 294 byte,but server sent 344

Bernhard Hiller 7-Aug-13 6:35am

Even that should not cause that error. Look at the contents: do they start like correct XML, i.e. with a "<?xml"

abtinC# 2009 11-Aug-13 3:36am

this is true .my returned file from web service have this code befor "xml header ":

" 11 Aug 2013 07:19:07 GMTContent-Length: 430"please help me