RE: SoapException - NullReferenceException

Hi Nick,

As for webservice over SSL, there does exists some common issue such as the
client certificate supplyment(if you've configured it to require client
cert) or the server certificate of the SSL is not recognized at client
side. Since the "Null Reference" exception is quite a general one, I think
it would be better to do more tests before we look further into it:

** You can turn off SSL and access it through normal http to see whether it
works.

** As you mentioned that you can visit the asmx page via webbrowser, is
there any warning or error when you visit it through webbrowser? Some
warning (that can be suppress interactively) may cause exception when we
access it programmtically

**As Alex suggested, Eventlog is also worth checking for any useful clues.

If you have any other findings, also welcome to post here.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


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--------------------
From: "Nick" <a@xxxxx>
Subject: SoapException - NullReferenceException
Date: Tue, 20 May 2008 19:30:55 +0100

Hi there,

I have a web service running on an SSL connection and unfortunately I
can no longer invoke it, even from a test application that just calls one
method. I can see the web service definition if I browse to the asmx
file,
but I can't call it. I recieve the following SoapException,

----

System.Web.Services.Protocols.SoapException was unhandled
Actor=""
Lang=""
Message="Server was unable to process request. ---> Object reference not
set to an instance of an object."
Node=""
Role=""
Source="System.Web.Services"
StackTrace:
at
System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClien
tMessage
message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String
methodName, Object[] parameters) at
WindowsApplication1.MyServices.SomeService.someFunction()....bla bla bla

----

Unfortunately I have no idea what has caused this problem and even
redeploying the web service and re-creating the application in IIS7 it
still
does not work. Any ideas on what could have happened here? I know this
is
a very generic problem so I am greatly appreciative of any help.

Nick.




.

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