Error 0x80040048

Value: -2147221432 | 0x80040048 | 2147745864

What does it mean ?

TAPI_E_CALLCENTER_INVALAGENTID  
Invalid agent ID.
Value: 72 | 0x0048 | 0b0000000001001000

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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