DFS Namespaces and Windows Server 2008 R2

When trying to create a new DFS namespace in Windows Server 2008 R2 SP1, I was encountering the error;

\\Domain.local\Files: The namespace cannot be queried. The RPC server is unavailable

After searching online for this issue and following a number of other instructions from Microsoft I found that the error was due to a previous testing namespace I had created with the name I now wanted to use.

Choosing another name for the namespace (ie. Shared) allowed the namespace to be created and folders to be added to it.