Error 0x80040052

Value: -2147221422 | 0x80040052 | 2147745874

What does it mean ?

TAPI_E_RESOURCEUNAVAIL  
A resource needed to fulfill the request is not available.
Value: 82 | 0x0052 | 0b0000000001010010

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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