"Add" doesnt work on non-existing arrays?

[TomKay]

Hi there,

I got a knot in my brain and I am sitting here for two hours and can’t see the trees for the forest anymore.

This is my initial setting. I now found, that this won’t do anything, if “58” is empty/non-existent. It can happen if this product doesn’t have any pdf-files stored to it.

So I need a solution that does the following:

If “58” is empty/not-existing, just use “56” as array. If 58 is not empty, add “56” to 58 (as above).

I tried with “ifempty” - but here I can only return either “58” or “56”.

As I said, I currently have a knot in my head that I cant open.

What do I have to do?

Thanks in advance,

Tom

[TomKay]

I seem to have solved it with this solution (thanks to my energy drink )

I was just wondering: If that blue label is white instead with a blue outer line, then it means that the value was empty, right?