Error 0x8051002C

Value: -2142175188 | 0x8051002C | 2152792108

What does it mean ?

OPC_E_DS_MISSING_SIGNATURE_ALGORITHM  
The signature markup does not specify a signature method algorithm.
Value: 44 | 0x002C | 0b0000000000101100

Where does it come from ?

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

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