Error 0x8051000F

Value: -2142175217 | 0x8051000F | 2152792079

What does it mean ?

OPC_E_DUPLICATE_DEFAULT_EXTENSION  
More than one Default element specifies the same extension in the content type XML markup. For more information about Default elements and content type XML markup, see the OPC.
Value: 15 | 0x000F | 0b0000000000001111

Where does it come from ?

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

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