Next question: How can I restrict the number of choices in a multiple_choices field to for example three? I found that this count-selected(.)<=3. (found it here: https://www.datawinners.com/find-answers-app/xlsform-how-can-i-restrict-the-number-of-selected-answer-for-a-multiple-cho…)
should work but it does not for me. I also tried count-selected<=3 (without the dots), but also that does not work. Andy ideas?