I am getting "Intf SHut" for the values in the Point Builder for all of the tags in my database
"Intf Shut" is the suggested value to use with the UniInt parameter /STOPSTAT or OPC parameter /OPCSTOPSTAT which configures an interface to write "Intf Shut" to all tags loaded by an interface when the interface shuts down gracefully.
This means that one or more of your interfaces have been shut down. That's why you are seeing this value in your tags.
Could you please check the shutdown attribute in your PI Point configuration. Shutdown events are written to point points when PI Data archive is restarted and point attribute -->Shutdown(PI Point Configuration) is set to 1 and can be disabled by setting it to 0.
If you are setting Intf shut digital state and check the points and relevant interface
UniInt Section --> Data Handling --> Write Status to tags on Shutdown.
Retrieving data ...