Hi,

I need to validate subquestions in an array(numbers) with checkboxes. For each row, no more than two options should be selected. I can write the following as question validation (as it is shown in the manual):  Is it possible to do this in a more efficient way? For me, this would be very helpful, because I have a lot of these questions and in each question, there are a lot of subquestions. So the approach above will take long time. Is it, for example, possible to do this in a loop?
I have tried subquestion validation with this, however, I dont know how to get access to the columns.

Thank you for your help!

Oh, please, don't tell me it's a lot of work.

You use the "self" operator, so you are independent of the question code.
If you prepare ONE long validation in a text editor. like
count(self.sq_SQ001) and count(self.sq_SQ002) and count(self.sq_SQ003) and ... and count(self.sq_SQ030) and ...

you just paste the necessary part into your question validdation.
Faster than anything else.

Joffm