Error 0x8004001E

Value: -2147221474 | 0x8004001E | 2147745822

What does it mean ?

TAPI_E_INVALLIST  
Invalid list passed as a parameter
Value: 30 | 0x001E | 0b0000000000011110

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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