Error 0x800401EF

Value: -2147221009 | 0x800401EF | 2147746287

What does it mean ?

MK_E_ENUMERATION_FAILED  
Moniker could not be enumerated
Value: 495 | 0x01EF | 0b0000000111101111

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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