MDX exclude from level of hierarchy - mdx

Question

I have a Geography hierarchy made this way:
level 1: Continent
level 2: Area
level 3: City
I have to extract data of all distinct continents, but I have to exclude a specific city from one continent.
I cannot use neither WHERE clause nor nested FROM to filter it.
I tried many solutions such as EXCEPT, FILTER and "-" functions but none worked.
Here's an example of one of my wrong attempts, which extracts data but doesn't exclude the city I don't want:
Except(
[Zone].[GeographyHierarchy].[Continent].ALLMEMBERS,
{
Descendants(
[Zone].[GeographyHierarchy].[Continent].&[ContinentIWant].&[AreaIWant].&[CityIDontWant]
, [Zone].[GeographyHierarchy].[Continent], SELF_AND_BEFORE ) }
)
Can anybody help to find a working solution?
Thank you all.
EDIT:
I think there's no solution by working on the highest level of the hierarchy, so I started filtering on the lowest level (City):
Except( [Zone].[GeographyHierarchy].[City].ALLMEMBERS,
{ [Zone].[GeographyHierarchy].[Continent].&[ContinentIWant].&[AreaIWant].&[CityIDontWant] } )
In this way I have all the distinct cities I Want, but I should now aggregate them on the higher level Continent.
Any idea on how to do it?

Answer 1

If you are not to use a WHERE clause then you’ll need to create a new calculated member for the continent with the exclusion
WITH
MEMBER [Zone].[GeographyHierarchy].[ALL].[ContinentIWant_exclX] AS
[Zone].[GeographyHierarchy].[Continent].&[ContinentIWant]
- [Zone].[GeographyHierarchy].[Continent].&[ContinentIWant].&[AreaIWant].&[CityIDontWant]
SET [Continents] AS
EXCEPT(
[Zone].[GeographyHierarchy].[Continent].MEMBERS,
[Zone].[GeographyHierarchy].[Continent].&[ContinentIWant]
)
+
[Zone].[GeographyHierarchy].[ALL].[ContinentIWant_exclX]
...
Not ideal but without the possibility of using the WHERE clause things become tricky