Error 0x8004166D

Value: -2147215763 | 0x8004166D | 2147751533

What does it mean ?

QPARSE_E_EXPECTING_REGEX_PROPERTY  
Regular expressions require a property of type string.
Value: 5741 | 0x166D | 0b0001011001101101

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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