Hello,
I get this error upon deselection of an option within a question that triggers a repeat group.
This is my repeat group.
this is likely due to how commcare app doesn't really remove repeats that are created.
so if you selected 4 items, and it created 4 repeats, and then you deselected 1 of the original 4 items, you're still going to end up with 4 repeats.
i'd put a condition on the calculation that checks if the current repeat position is > = # of items selected
Thanks for the swift response. it's strange that i have never had this problem with repeat groups in the past.
Would the calculation be in a hidden field? And where exactly do i place that, inside or outside of the repeat group?
inside crop to display
so in our example of selecting 4 crops and then changing that to 3, what's hapening is this:
crop_based_questions[4] is trying to calculate crop_to_display. but there is not item at selected-at(crops, 4) so it throws an error.
if you do something like if (position(..) > count_selected_crops, 0, selected-at(etc...))
it will see that 4>3, and return a 0 instead of an error.
my code has 3 dots you likely need 2
position(..)
my memory is bad, can't remember exact syntax to get position of current repeat
i did something before where i made a hidden calculation that's called "cur_position" inside the repeat
where the calculation was position(..) + 1
then where i needed to make a reference to the position, i did the condition like this
if(current()/../cur_position > path_to_size_of_selected_items, 0"which means return false() and do nothing, perform a calculation)
HTH
GL
Mazz