YTD as a Variable in DAX

Hi'

I have a problem with this dynamic measure. It dosent return the Year-to-Date and Month-to-Date Calculation when the dimensions MeaPer is used. The Measure correctly return the Accounting and Reporting values, but not the time-intelligence measures.

Any Ideas ? :)

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Net Invoiced Amount NEW :=
VAR Acc =
    SUM ( SalesInvoiceTransactions[NetInvoiceAmountAcc] )
VAR Rep =
    SUM ( SalesInvoiceTransactions[NetInvoiceAmountRep] )
VAR Cur =
    IF (
        HASONEVALUE ( Parameters[Currency] );
        SWITCH (
            VALUES ( Parameters[Currency] );
            "Accounting"; Acc;
            "Reporting"; Rep;
            Rep
        );
        Rep
    )
VAR Per =
    IF (
        HASONEVALUE ( MeaPer[Time] );
        SWITCH (
            VALUES ( MeaPer[Time] );
            "YTD"; TOTALYTD ( Cur; 'Calendar'[Date] );
            "MTD"; TOTALMTD ( Cur; 'Calendar'[Date] );
            BLANK ()
        );
        Cur
    )
RETURN
    Per

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Best Regard

Ivan