Error 0x80520387

Value: -2142108793 | 0x80520387 | 2152858503

What does it mean ?

XPS_E_PACKAGE_ALREADY_OPENED  
XPS Digital Signature: An XPS package has already been opened in the signature manager.
Value: 903 | 0x0387 | 0b0000001110000111

Where does it come from ?

FACILITY_XPS  
XPS (XML Paper Specification) Document
Value: 82 | 0x052 | 0b01010010

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