Hi, I have to count the number of invoices between two dates (starting date and ending date). I have a time dimension, and a another with the two dates. I've created a measure : CREATE MEMBER [CTNAV].[Measures].[Nb] AS count( Filter ( [Bon Vouchers].[NÃ‚Â° Bon Vouchers].[NÃ‚Â° Bon Vouchers].Members, [Bon Vouchers].[Starting Date ].CurrentMember.MemberValue >= [Time].[Date].CurrentMember.MemberValue ) ) The problem is that if I display all the dates, each measure is at 0 but the total is ok (>0). Sorry for my english. Thanks for your help.