Error 0x80042609

Value: -2147211767 | 0x80042609 | 2147755529

What does it mean ?

The user name mapping cannot be read. Check that the database, view, and column names are correct, that the Notes database is accessible, and that the sort option is enabled. For more information, see the Administrator's Guide.
Value: 9737 | 0x2609 | 0b0010011000001001

Where does it come from ?

COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

Other Errors for FACILITY_ITF