Dears:
I'm talking about one Date formated column. When my Parent cell has that formula and I have 4 children's (2 filled and 2 unfilled) the formula returns the MAX value between the 2 filled cells. I want for my Parent the MAX from all four childrens. I need to return the MAX value only when the 4 childrens are filled. What can I do in order to avoid any result while there are any children without information?