Hi all, I'm trying to apply custom validation to the below side-by-side table so that for each row, the option selected in column one cannot be the same as column two. (i.e. the primary and secondary artform cannot be the same) ! I would have thought this was fairly straightforward, so have created the below custom validation using ${q://QID61%232/SelectedAnswerRecode/1} as the reference value for "does not equal", adjusting the last number for each row. ! However, this correctly validates the top row, but none of the others. I've scoured the validation for any obvious errors that I know of. I'm wondering if the reference values i'm using are incorrect? How would you all go about this? Any advice would be much appreciated. Many thanks!