Choice filter from select_many to select_one with exception

[Kal_Lam]

Welcome to the community, @pallone! Maybe this post discussed previously should help you solve your issue:

Cascade in reverse way

You could do it as outlined in the image shared below: In the survey tab of your xlsform: [Image 1] In the choices tab of your xlsform: [Image 2] Data entry screen as seen in Enketo: [Image 3] Data entry screen as seen in Enketo: [Image 4] Data entry screen as seen in Enketo: [Image 5] Data entry screen as seen in Enketo: [Image 6] Reference xlsform: Cascading Select.xlsx (12.3 KB)