The delivery protocol could not be closed.

Details
Product: SQL Server Notification Services
Event ID: 6012
Source: NotificationServices
Version: 2.0.9999.9
Message: The delivery protocol could not be closed.
   
Explanation
This error occurs when a call by the distributor to the IDeliveryProtocol.Close() method of a delivery protocol generates an exception.
   
User Action
If you are using a built-in delivery protocol, examine the error log entry to determine the cause of the failure.

If you are using a custom delivery protocol, it is throwing an exception in its implementation of the IDeliveryProtocol.Close() method. The error log entry contains more details about the type of exception that was thrown. Examine your code to determine why the exception is being thrown.

For more information about how to debug a custom content formatter using a source code debugger, see the topic “Debugging a Custom Component” in Notification Services Books Online.

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