
Hi @MotionMan,
Could you tell me what is the purpose of checking if these fields are empty?
And I am afraid that I don't understand why you have to check if it is empty one by one.
I try to use Expression according to your ideas, it seems that can't do what you want.
Maybe try to start with the fundamental needs, use other methods to achieve your needs.
Please provide another more details about your requirements.
Best Regards,
Barry