Results of Lookup non-visible

I use Lookup to retrieve some values in the data editor. But its results are not available as a column in the drop-down lists (when I choose what to depict). What do I do wrong?

PS. Forgive me if I have lost my ability to think after hours in front of the screen!

Are you using a lookup on a multiple relation column? If so, it won’t work properly.

1 Like

Now that you mention that, it’s absolutely clear.