Playing around with WCF web services in VS 2010 and .NET Framework 4.
When I run the WCF Test Client across the web service I get the above error. The service still works but there’s an error symbol (a ! in a red circle on the LHS).
Mr. Google to the rescue and you need to change the framework config file here:
Comment out the “endpoint” section i.e.
<!-- <endpoint address="" binding="netTcpRelayBinding" contract="IMetadataExchange" name="sb" /> -->
Even though it still works, I hate these niggly errors in case I’ve screwed up