MDX - function expects a string or numeric expression for the 1 argument. A tuple set expression was used.

Question

why this query
select [Measures].[F Events Count] on 0,
Filter([D Actor Player].[Actor].children,
([Measures].[F Events Count],
{([D Date].[Hierarchy].[Season].[2012 - 2013]),([D Date].[Hierarchy].[Season].[2013 - 2014])},
[D Result].[Result].&[Goal])
>=5) on 1
from [FBA Cube]
gives this error:
Query (3, 3) The >= function expects a string or numeric expression for the 1 argument. A tuple set expression was used.
while the following query works fine
select [Measures].[F Events Count] on 0,
Filter([D Actor Player].[Actor].children,
([Measures].[F Events Count],
[D Date].[Hierarchy].[Season].[2012 - 2013],
[D Result].[Result].&[Goal])
>=5) on 1
from [FBA Cube]
why having set inside Filter's boolean expression generates that error? how can we
keep the set inside the Filter's boolean expression but
solve the problem? please explain the reason and solution

Answer 1

Hi Butmah ,
I think you should use an aggregation function with the set and the tuple ... adding an AdventureWorks snippet :
select [Measures].[Order Count] on 0,
Filter([Product].[Category].children,
SUM({[Date].[Fiscal].[Fiscal Year].&[2011],[Date].[Fiscal].[Fiscal Year].&[2009]}
,([Measures].[Order Count],[Geography].[Geography].[Country].&[United States])
>=5) on 1 
from [Adventure Works]
Regards, David .