Every time I try to find the number in the list I get this error, what is happening?
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 Tools
Show us a screenshot including Do it results of Codigo_de_Barras.Texto and global Codigo_de_Barras
also next time please switch the language to English before taking a screenshot…
Taifun
Make sure global codigo variable is a list. How did you obtain values in that variable?
If you are using gsheet then try gviz method
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