The problem you have is that if time dimension B is not selected as part of a query, it is essentially selecting the [All] level by default. So if you scope the calculation to be null when Time B is [all] then it will always result in null, no matter whether [all] is physically specified or not.

Does that make any sense?… Essentially you will have to allow the calculation to take place for [All], otherwise the calculation can never take place under any circumstances.

Alex

ive used the above method in the following context:

- two time dimensions(A, B), one calculated measure
- for time dimension A, calc measure should display its value
- for time dimension B, calc measure should = NULL

- for time dimension A, the calc measure returns the correct values.
- for time dimension B, the descendant levels return NULL. the [All] level however returns the calc measure’s total.

How can I make this NULL also, without breaking the correct functionality as far as dimension A is concerned?

Many thanks,

Peter