SSAS Bad Calculation Value requires Reconnect

I learned today that you must refresh the Calculations Tab if you plan to drag and
drop items from the Metadata tab to the Expression or else you may drag a
member that may have changed or even not exist. Do this by clicking the
Reconnect Icon just like you would in the Browser Tab when you get the warning "The cube has been
reprocessed on the server. To prevent possible browsing errors, click
Reconnect. To hide this message, Click here."

The Calculation and Cube may process without error but you
will not get the desired results. The clue to this will be a bad value (#Value!)
displaying in the corresponding cell when you browse the Cube.

Unfortunately there is no warning on the Calculation Tab to
let you know the Metadata needs to be refreshed. This also applies to the KPIs
and Actions Tabs.