I was never able to get this to work, and now I have another case where I need to do something similar as I have a linked table that is dynamic and need to use as a filter in a router. Can someone see what I might be doing wrong?

Thanks

Scott

I am not quiet sure your syntax is correct is probably should be

..Piece(source.{PV1:AlternateVisitID},"~",*)

or 

source.{PV1:AlternateVisitID(~).IDNumber}

https://docs.intersystems.com/healthconnectlatest/csp/docbook/DocBook.UI.Page.cls?KEY=EEDI_virtual_property_paths

One way you can do this is using the function Piece.

https://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=RBAS_fpiece