Error 0xC0040DB9

Value: -1073476167 | 0xC0040DB9 | 3221491129

What does it mean ?

GTHR_E_NTF_CLIENT_NOT_SUBSCRIBED  
Notification client is not subscribed.
Value: 3513 | 0x0DB9 | 0b0000110110111001

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

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