Error 0x0004121B

Value: 266779 | 0x0004121B | 266779

What does it mean ?

PRTH_S_NOT_ALL_PARTS  
Some parts of this document cannot be accessed.
Value: 4635 | 0x121B | 0b0001001000011011

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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