Targeting a specific row in the repeater

I want to access a specific row in the repeater (from the outside) and then add a new row (kind of a child for a marked row). I was able to achieve almost everything except adding a new row. I got access to the repeater from outside, I even triggered the action “Add new row” but it didn’t do anything…

https://jeikar.axshare.com/#g=14

target_a_specific_row.rp (161.4 KB)

and here is the file :slight_smile: