By 'between' do you mean inclusive or exclusive? By the sample in your original post I take it that you mean exclusive, in other words, the endpoints are NOT valid values. To do that, you would need to set your low point one day lower than expected, and the high point one day higher than expected, since the function is inclusive. As per the CR help file, the data range 01-Sep-1999 to 30-Sep-1999 includes the values of 01-Sep-1999 and 30-Sep-1999. To exclude 01-Sep-1999 from the set the range would have to be 02-Sep-1999 to 30-Sep-1999.

HTH,

Randy

>Thank you for the assistance.
>Here my formula
>
>IF {@Ddebut} in {lv_cr_76x.ddebut} to {@FinAccord} Then True ELSE False
>
>I cannot guess in advance the value of @Ddebut.
>If @Ddebut is not included between {lv_cr_76x.ddebut} AND {@FinAccord} the formula MUST turn over false.
>It is not currently the case IN CR.
>
>bernhart