Hi Dan.

I don't know of ways to have up-to-date Age as dimension.

You can have level property Age, that will be calculated at run-time (checkbox "Get value at runtime").

See for example, HomeD.City level, property Population at Patients cube in SAMPLES namespace.

Also, see "Defining Age Members" section in docs:
http://docs.intersystems.com/cache20152/csp/docbook/DocBook.UI.Page.cls?...