-1261 0xFFFFFB13   NWDP OE NF SRVC NOT FULL ENABLD

Source:  NDPS, Notification Service NLM program

Explanation:  The ENS is not fully enabled.

Possible Cause:  A delivery method tried to register itself with the ENS while it was still coming up.

Action:  Wait for the ENS to finish coming up, they try again.