multiple dimension restrictions in a MDX where clause - sql-server-2005

Question

I have the following problem. If I query values with a keyfigure which is a function I can't specify multiple values of the same dimension restriction, but if it is not a function it works.
So this works:
SELECT {[Measures].[Netto]} on columns FROM TDC where
({NonEmpty([Time].[Month].[Month].&[2008-03-01T00:00:00]),
NonEmpty([Time].[Month].[Month].&[2008-04-01T00:00:00])})
But this doesn't:
SELECT {[Measures].[CalculatedFunction]} on columns FROM TDC where
({NonEmpty([Time].[Month].[Month].&[2008-03-01T00:00:00]),
NonEmpty([Time].[Month].[Month].&[2008-04-01T00:00:00])})
And this also works:
SELECT {[Measures].[CalculatedFunction]} on columns FROM TDC where
({NonEmpty([Time].[Month].[Month].&[2008-03-01T00:00:00])})
I guess the solution is something like adding the where clause to the header but I really like this solution because it's so simple.
The Calucated function is:
CREATE MEMBER CURRENTCUBE.[MEASURES].Ultimo
AS (iif ((not [Time].[Year - Month - Date].currentmember is [Time].[Year - Month - Date].defaultmember),
IIF(NOT ([Measures].[LagerStk] = 0),
Sum([Time].[Year - Month - Date].[Date].members(0):
ClosingPeriod([Time].[Year - Month - Date].[Date]),
[Measures].[LagerStk]), NULL)
,
IIF(NOT ([Measures].[LagerStk] = 0),
Sum([Time].[Year - Week - Date].[Date].members(0):
ClosingPeriod([Time].[Year - Week - Date].[Date]),
[Measures].[LagerStk]), NULL))),
VISIBLE = 1;
The code is inspired from this and modified for two hierarchies in the time dimension: http://www.sqlserveranalysisservices.com/OLAPPapers/InventoryManagement%20in%20AS2005v2.htm
This is on SQL server 2005 Enterprise edition.

Answer 1

Ok, this works:
WITH MEMBER [Time].[Month].a AGGREGATE
({[Time].[Month].[Month].&[2008-03-01T00:00:00],
[Time].[Month].[Month].&[2008-04-01T00:00:00]})
SELECT {[Measures].[CalculatedFunction]} on columns FROM TDC where a

Answer 2

The problem is in your calculated measure. You are using .CurrentMember and ClosingPeriod without a specific member reference which implies a call to .CurrentMember. When you have set in the WHERE clause there is no "Current" member - there are multiple current members. Re-writting your MDX to something like the following should allow it to work with multiple members in the WHERE clause.
CREATE
MEMBER CURRENTCUBE.[MEASURES].Ultimo AS NULL;
SCOPE ([MEASURES].Ultimo);
SCOPE ([Time].[Year - Month - Date].[All]);
this = IIF
(
(NOT
[Measures].[LagerStk] = 0)
,Sum
(
NULL:Tail(Existing [Time].[Year - Week - Date].[Date],1).item(0).item(0)
,[Measures].[LagerStk]
)
,NULL
);
END SCOPE;
SCOPE ([Time].[Year - Week - Date].[All]);
this = IIF
(
(NOT
[Measures].[LagerStk] = 0)
,Sum
(
NULL:Tail(Existing [Time].[Year - Month - Date].[Date],1).Item(0).Item(0)
,[Measures].[LagerStk]
)
,NULL
)
);
END SCOPE;
END SCOPE;
I am using SCOPE on the All members of the two dimensions, this should be fast that the out IIF and will also avoid one reference to .CurrentMember. I then replaced the ClosingPeriod() call with Tail(Existing [Time].[Year - Week - Date].[Date],1).item(0).item(0) what this does is to get the set of date members that exist in the current context, the Tail() call then gets the last on of these as a single member set and the .Item(0).Item(0) calls get the first member from the first tuple of that set.
Obviously, not having access to your cube, I can't test any of this. The issue you reported in your comment could relate to either an incorrect reference to the All members (I may have a different naming format to the one in your cube) or it may be related to the IIF() statement. I'm not sure that the check for 0 is being evaluated in the correct context
You could try testing without the IIF()
CREATE
MEMBER CURRENTCUBE.[MEASURES].Ultimo AS NULL;
SCOPE ([MEASURES].Ultimo);
SCOPE ([Time].[Year - Month - Date].[All]);
this = Sum
(
NULL:Tail(Existing [Time].[Year - Week - Date].[Date],1).item(0).item(0)
,[Measures].[LagerStk]
);
END SCOPE;
SCOPE ([Time].[Year - Week - Date].[All]);
this = Sum
(
NULL:Tail(Existing [Time].[Year - Month - Date].[Date],1).Item(0).Item(0)
,[Measures].[LagerStk]
);
END SCOPE;
END SCOPE;