Error 0x80EE004E

Value: -2131886002 | 0x80EE004E | 2163081294

What does it mean ?

RTC_E_ROAMING_FAILED  
Roaming session failed
Value: 78 | 0x004E | 0b0000000001001110

Where does it come from ?

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

Other Errors for FACILITY_RTC_INTERFACE