InfoPath Dev

Dear Support, I have 2 fields, I want to set value of Field 2 = ABC if Field 1. How to do it. I try to make my file. but not work Please see attached file

Thanks for attaching a sample - it makes it easy for me to help you. :) So - see attached. There is a rule on field 1 to set field 2. One thing to note - rules only run if the field the rule is on changes. So if the user changes field 2 to XYZ it is not going to change back to ABC. But if the user changes field 1 from 1 to 2, then back to 1 again, it will get reset to ABC. Just something to keep in mind. Save the file locally, right click and select Design to open in design mode.