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I am calling a 'old school' asp.net webservice (no wcf), hosted in IIS, secured with Windows Authentication and anonymous not allowed.

When I call this from a test app from an other server (winforms, vs2008SP1, .net 3.5), having a generated client app.config with WCF bindings, logged on with a user that is granted on AD and on the hosting webservice server, I get an error:

" Server was unable to process request. ---> Object reference not set to an instance of an object."

I have security mode = TransportCredentialOnly" and transport clientCredentialType='Windows'....

John Saunders
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Patrick Peters
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  • That means a bug in the web service. At least upgrade it to .NET 1.1 and the latest service pack, or else discard it. – John Saunders Feb 18 '11 at 16:44
  • Also, see [What is a NullReferenceException in .NET?](http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-in-net) – John Saunders Feb 18 '11 at 16:45

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