Error 0x80045011

Value: -2147201007 | 0x80045011 | 2147766289

What does it mean ?

SPERR_RULE_NOT_FOUND  
Invalid rule name passed to ActivateGrammar.
Value: 20497 | 0x5011 | 0b0101000000010001

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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Other Errors for FACILITY_ITF