Hi Mohamed,

From the output it looks like the app is trying to get item at index 28
from assetinfo_list, while that list is of only 17 length. So it seems
likely that either app is not inserting enough items into assetinfo_list,
or you are clicking on treedata.selection at a higher item than there are
assets for in the list, or something is going wrong with associating click
with the selection number.

To get further help, I think you will need to create a minimal runnable
example that shows the issue and upload it here.