I am getting the following error when attempting to generate C# proxy
code with the wsdl.exe tool:
Error: Unable to import binding '...' from namespace
'...'.
- Unable to import operation '...'.
- The element '...' is missing.

* I have removed the name of the web service, operation and element for
privacy reasons.

I get the same error when trying to add the web service as a web
reference to my C# project.

The wsdl contains an import statement which imports an xsd which
includes several other xsd's. The xsd's all share the same namespace.

I do not have access to update or modify the wsdl file as it belongs to
another company. How can I generate the proxy code for this wsdl?