InfoPath Dev

I had a different solution. In changed event of the checkbox i controlled if the value is true, then set a value in the xml which i control when submitting the form.It works fine.Remember to set "always"  ıf the postback options of the checkbox

Hello; I have a browser-enabled form which has a repeating table in it. My problem is: how can i validate that at least one of the checkboxes  is selected and prevent the form to be submitted if none is selected. I'd appreciate any help.Thank you Doga