Error 0x8004170C

Value: -2147215604 | 0x8004170C | 2147751692

What does it mean ?

FILTER_E_UNKNOWNFORMAT  
The document format is not recognized by the flter.
Value: 5900 | 0x170C | 0b0001011100001100

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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