Error 0x80040049

Value: -2147221431 | 0x80040049 | 2147745865

What does it mean ?

TAPI_E_CALLCENTER_INVALAGENTGROUP  
Invalid agent group.
Value: 73 | 0x0049 | 0b0000000001001001

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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