Error 0x8051003F

Value: -2142175169 | 0x8051003F | 2152792127

What does it mean ?

OPC_E_MC_UNKNOWN_PREFIX  
The package contains an XML prefix that is not defined.
Value: 63 | 0x003F | 0b0000000000111111

Where does it come from ?

FACILITY_OPC  
Open Connectivity Service (Package Consumption)
Value: 81 | 0x051 | 0b01010001

Other Errors for FACILITY_OPC