Source: NDPS, Notification Service NLM program
Explanation: The ENS received an unknown delivery method.
Possible Cause: The application you are running encountered a programming error. The identifier for the delivery method was not correct.
Action: Make sure the identifier for the delivery method is correct.
Possible Cause: An application sent the ENS a request that specified a delivery method that is not currently installed.
Action: Make sure the delivery method being requested is installed on the server. You can installed a delivery method remotely by sending an Add Method request to the ENS or by loading the appropriate .ens file on the server.
If the problem persists, contact the developer of the application.