Error 0x8001FFFF

Value: -2147352577 | 0x8001FFFF | 2147614719

What does it mean ?

RPC_E_UNEXPECTED  
An internal error occurred.
Value: 65535 | 0xFFFF | 0b1111111111111111

Where does it come from ?

FACILITY_RPC  
RPC subsystem
Value: 1 | 0x001 | 0b00000001

StackOverflow

Other Errors for FACILITY_RPC