I am trying to use the except function when I create a custom measure, but I keep getting the error "The function expects a string or numeric function for the argument. A tuple set expression was used." The MDX statement that I am testing looks like
as ([Measures].[AR Balance],
EXCEPT([AR FSC].[FSC Payer].[All].children,
[AR FSC].[FSC Payer].&))
([Date of Posting].[Fiscal Month].&&)
Why doesn't this work? Thanks.
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