Is the form one that you can post here? Or an excerpt from the form with the questions that have values in your relevant and calculation columns?
You may also take a look at comments by @xiphware in this topic (it is about the same error):
Is the form one that you can post here? Or an excerpt from the form with the questions that have values in your relevant and calculation columns?
You may also take a look at comments by @xiphware in this topic (it is about the same error):