Originally Posted by Isadelia
Okay, it seems that I misunderstood how to handle the custom columns but I found the solution and everything works perfectly now, thanks a lot for your work !
If you post a problem and later discover the answer, it is good form to not only express your pleasure to the forum at having resolved your problem, but also to offer some hint to others who might have experienced the same issue. I have the same error you did. Sadly, your post offers no help at all, other than to know that an answer is out there somewhere.