Symptoms
In Microsoft Visual Studio .NET 2003, when you try to add a Web reference to a Web service, or when you call a Web service method, you may receive the following error message:
There was an error downloading ‘http://WebServerName/WebServicePath/WebServiceName’. The operation has timed-out.
Note WebServerName is a placeholder for the name of your Web server, WebServicePath is a placeholder for the path of the Web service, and WebServiceName is the name of the Web service.
In addition, when you use the IPAddress class, you may receive a “System.TypeInitializationException” exception. For example, when you use the Web Service Description Language tool (Wsdl.exe) to try to create a Web service proxy file, you may receive the following error message:
Unhandled Exception: System.TypeInitializationException: The type initializer for “System.Net.Sockets.Socket” threw an exception. —> System.Net.Sockets.SocketException: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full at System.Net.Sockets.Socket.InitializeSockets() at System.Net.Sockets.Socket..cctor()
Note You do not receive the previous error messages when you use Microsoft .NET Framework v1.0.
Resolution
When you install a protocol or a network adapter on your computer, the operating system creates a protocol binding between the network adapters and the protocols that are installed on your computer. Typically, a computer can store up to 50 protocol binding details. Therefore, if the number of protocol bindings exceeds 50, and you use the IPAddress class directly or indirectly (such as when you try to add a Web reference or when you call a Web service method), you receive the error messages that are mentioned in the “Symptoms” section of this article.
NotesThe operating system creates a protocol binding even for “phantom” (“ghosted”) adapters on your computer.
For additional information about phantom devices, click the following article number to view the article in the Microsoft Knowledge Base:
241257?(http://support.microsoft.com/kb/241257/) Device Manager Does Not Display Devices Not Currently Present in Windows 2000To determine the number of protocol bindings on your computer, run the enum.exe file.
The following file is available for download from the Microsoft Download Center:
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Download the enum.exe package now.(http://download.microsoft.com/download/9/3/0/930e1ecb-a6c6-445f-bd79-82fc3e66f009/enum.exe) For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591?(http://support.microsoft.com/kb/119591/) How to Obtain Microsoft Support Files from Online Services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
