Error 0x8051003C

Value: -2142175172 | 0x8051003C | 2152792124

What does it mean ?

OPC_E_MC_INVALID_ENUM_TYPE  
Encountered an enumeration type that is not valid.
Value: 60 | 0x003C | 0b0000000000111100

Where does it come from ?

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

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