Hi Bernard Thanks. Good to get your confirmation for this new functionality. I'm fine as long as I can say that it's something which can be delivered within a reasonable timeframe. "The best approach on 6.2 is along the lines of what SASBIROX proposes.." I'm kind of astonished that you believe this can work at all. I'll give it another go then as what I've tried so far didn't allow me to include data for a calculation over the boundaries of a category. I might have something misunderstood/done wrong here then. Thanks again Patrick ... View more