Error 0x80EE001A

Value: -2131886054 | 0x80EE001A | 2163081242

What does it mean ?

RTC_E_SIP_REQUEST_DESTINATION_ADDR_NOT_PRESENT  
The Request destination address is not known
Value: 26 | 0x001A | 0b0000000000011010

Where does it come from ?

FACILITY_RTC_INTERFACE  
RTC - Real-time Communications
Value: 238 | 0x0EE | 0b11101110

Other Errors for FACILITY_RTC_INTERFACE