columns of sheet not working

Trying to get the “columns” of a sheet isn’t returning anything. Not even an empty list. (Getting the “cells” works just fine for me.) Is this a known issue? Thanks.

Actually, getting the cells does not work just fine. I need to cast it to a list to use it as a list. Why do I need to do that? It is a list. (And I usually need to cast the “name” or “location” to a string when I want to use them …)

I’ve just tried this and the expected columns are returned. Could you send the sheet to cgrunenberg - at - Then I could check this over here, thanks.