Select list item: Attempt to get item number 1 of a list of length 0: ()

Hi I have created an radio app where in the user can click extra button of collin list tree and select as favourite radio. but i am getting error “Select list item: Attempt to get item number 1 of a list of length 0: ()”
Pls help me

There is clear error ur fav name list is empty

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No, the error is coming from the select list item. And the RadioName_1Box variable is empty

You have two errors (red x marks). Maybe index in select list item list is getting values instead of numbers and you should use a combination of select list item list with index in list list block like this

image

how to get read of this error. What condition i have to put…

if you are using a loop block then i will say you are getting error from it or the Colin tree list extension has making an error