EDIT:
After I modified the web.config and I don\'t get error that\'s good.... then I add a new page (html) and write this small code to consume the serv
FYI - YOU CAN also get this error from a machine that is not having enough memory free. I got this error on a machine I run with 16 gigs of memory. I had a VM running with 6 gigs and a LOT of memory intensive apps. Close some down and this problem went away.
I still did get the error in the title of the question of
Failed to add a service. Service metadata may not be accessible. Make sure your service is running and exposing metadata.`
I did notice a larger message about memory though in using the WCF Test Client.
Hope this helps someone else.