Error 0x80040047

Value: -2147221433 | 0x80040047 | 2147745863

What does it mean ?

TAPI_E_CALLCENTER_NO_AGENT_ID  
The Agent object was created with CreateAgent. It does not have an ID, use CreateAgentWithID.
Value: 71 | 0x0047 | 0b0000000001000111

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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