i want to count the items which is showing up in detail screen. I have list selection edit type in my detail screen. I am populating the data in the control using Complex table, i have include rule on this list selction which will include only items which met some specific criteria. Now on this transaction i want to write an validation rule which will check if the list selection is only having one item then show user an alert message. I want to know can we count list times associated with list selection in validation rule.