Error 0x8004166C

Value: -2147215764 | 0x8004166C | 2147751532

What does it mean ?

QPARSE_E_EXPECTING_REGEX  
Expecting regular expression.
Value: 5740 | 0x166C | 0b0001011001101100

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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