Calculate Cumulative Month Value in MDX

Question

I wanna calculate the cumulative values by month/year

My dimensions period as follow:

Period Dimension

I ve tried any ways to perform this operation, but unsucessfull

with member [Measures].[Valor Acumulado] 
as Sum(PeriodsToDate([Período].[Mês].[(All)]),[Measures].[Valor Pago]
)
 with member 
 [Measures].[Valor Acumulado] as Sum(YTD([Período].[Mês].[(All)]),
 [Measures].[Valor Pago])

Or the cumulative calcule does not work or appears a Error Message

CellOrdinal 1 VALUE #Error Query (2, 37) The YTD function expects a member expression for the argument. A string or numeric expression was used

Query execution Query execution

Is it necessary to make a concatenation with Year and Month members?

Anybody to help me?

Answer 1

Take a look at the sample below, it will help.

with 
member 
[Measures].[Internet Sales AmountRunningtotal]
as 
case when [Measures].[Internet Sales Amount] = null then null 
else 
sum({[Product].[Subcategory].firstchild:[Product].[Subcategory].currentmember},[Measures].[Internet Sales Amount])
end
select {[Measures].[Internet Sales Amount],
[Measures].[Internet Sales AmountRunningtotal]
} on columns,

non empty
([Date].[Calendar Year].[Calendar Year],[Date].[Calendar Quarter of Year].[Calendar Quarter of Year],
[Product].[Category].[Category],[Product].[Subcategory].[Subcategory])
on 
rows 
from 
[Adventure Works]

Result