Error 0x80042606

Value: -2147211770 | 0x80042606 | 2147755526

What does it mean ?

NOTESPH_E_ATTACHMENTS  
One or more attachments cannot be processed.
Value: 9734 | 0x2606 | 0b0010011000000110

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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