Setting constraints for two string variables

[Kal_Lam]

Maybe this post discussed previously should help you solve your issue:

Constraint not working

Hi @RayRay, Try this out. It should work for you. In the survey tab of your xlsform: [Image 1] Data entry screen as seen in Enketo: (while trying to make a wrong entry) [Image 2] Data entry screen as seen in Enketo: (while making a correct entry) [Image 3] Reference xlsform: Constraint Example.xlsx (9.6 KB) Have a great day!