The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Negotiate'

in this case we were using wshttpbinding
this was happening with some kind of certificate issue. we changed the client service url to refer to the port and this issue stopped

Like in sql profiler

is not sql's like - its an exact match

Access to the path 'blah' is denied.

could be read only issues

Immediate Window - end of expression expected

Check for illegal charcters

access denied pendchange permissions

the folder was read only

he message with To 'blah' cannot be processed at the receiver, due to an AddressFilter mismatch at the EndpointDispatcher. Check that the sender and receiver's EndpointAddresses agree.

other team members had checked in changes where they changed the name of the interface
OUCH

Generic constraints

here