I'm stuck in a code...Please help me

Hi. I’m stuck in a difficult problem. I want to write this code, so I did it like a picture, but I don’t know what’s wrong

set global json_data to join
join “{” (join (get global data_list join “,”)) “}”

image

use Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps

see also Live Development, Testing and Debugging

Taifun

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