XPS_E_PACKAGE_ALREADY_OPENED

Code: 0x80520387 (2152858503)

As HRESULT:

S: 1 (Failure)
C: 0 (Microsoft-defined)
N: 0 (Not an NTSTATUS value)
Facility: 0x052 (Unknown facility)
Code: 0x0387 (903)

As NTSTATUS:

Sev: 2 (STATUS_SEVERITY_WARNING)
C: 0 (Microsoft-defined)
Facility: 0x052 (Unknown facility)
Code: 0x0387 (903)

Documented in Win32

XPS Digital Signature API Errors (xpsdigitalsignature.h): 0x80520387

An XPS package has already been opened in the signature manager.