MDX statement depending on filtered element

Hi,

I am trying to apply an MDX statement based on the selected member on the filter dimension.

Filter dimension: Warehouse
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MDX statement per element in the Warehouse dimension attribute.

I retrieve the attribute value of the Warehouse (MDX statement) for the SKU dimension.
$<<SOP.Warehouse.Warehouse::Reservation MDX>>

But couldn’t get it to work.
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I think UX is managing setting service once but not recursive