Error 0x000401E7

Value: 262631 | 0x000401E7 | 262631

What does it mean ?

MK_S_MONIKERALREADYREGISTERED  
Moniker is already registered in running object table
Value: 487 | 0x01E7 | 0b0000000111100111

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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Other Errors for FACILITY_ITF