listbox filled on the fly has index = -1 for every items.

[#1]

Hello i have 2 listbox that are filled on the fl using a 2 dimension array.

The listbox show the value in the right boxes but no matter which item i select i always get -1 for the selectedItem.

Thanks for you help.

[#2]

I have uploaded the file here.

https://ufile.io/xs7gv