-1240 0xFFFFFB28   NWDP OE NF OPTION NOT SUPPORTED

Source:  NDPS, Notification Service NLM program

Explanation:  The ENS received an option that is not supported.

Possible Cause:  The application you are running encountered a programming error. An application submitted a request using options not supported by this ENS.

Action:  If the problem persists, contact the developer of the application.

If you are debugging a program, consult the SDK documentation to determine what options are supported by this version of the ENS.