Error 0x800401F4

Value: -2147221004 | 0x800401F4 | 2147746292

What does it mean ?

CO_E_IIDSTRING  
Invalid interface string
Value: 500 | 0x01F4 | 0b0000000111110100

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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