Very new to developing a SharePoint/working with Nintex forms - trying to create a validation on a drop down when I select the "Complete and Submit" button. I have done so with a date validation but I cannot figure out how to with a drop down choice control. How can I create a validation that will display an error when selecting Complete and Submit, when the field is left untouched (diplaying "Please select a value...")?
I have tried this and still no error message appears:
I have tried a few other formulas
Is there supposed to be a condition within the actual submitt button itself?