I have a form with a number of yes/no controls. I want a rule in place that makes sure at least one field is checked before the form can be saved. I added a validation rule to the save button as per below:
isNullOrEmpty(HarmFinancialLoss) && isNullOrEmpty(HarmKeyTargetsUnderachieved) && isNullOrEmpty(HarmWastedHrs)
When I do a preview and try to test rule, I am still allowed to save. This rule seems to work on a text box but not a yes/no control. Does anybody know what I am doing wrong please?