Error 0x8051001A

Value: -2142175206 | 0x8051001A | 2152792090

What does it mean ?

OPC_E_DS_DIGEST_VALUE_ERROR  
Cannot get the digest value of a package component or an element in the signature markup that was referenced for signing.
Value: 26 | 0x001A | 0b0000000000011010

Where does it come from ?

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

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