Show file open warnings

Supported on: At least Windows Server 2008 R2 or Windows 7

Registry

HKCU software\policies\microsoft\office\16.0\visio\application

Value name: showxmlopenwarnings

Enabled: showxmlopenwarnings = 1

Disabled: showxmlopenwarnings = 0

Indicates whether a warning message is displayed when you open files that contain errors such as invalid XML code.