InfoPath Dev

Thanks for the reply Hilary. I checked and the value of OrdType is "2" and the validation is on the SONumber field.  The first entry on the form is for the user to select the order type.  Further down the form is SONumber which is flagged with the red asterisk indicating that it is a required entry if the selection ...

I'm very new to Infopath and I know this is a simple fix.  The scenario is when the user checks a particular radio button (1 of 6) and a following entry field is blank, then I want to display an error message.  I added the following data validation to one of my fields but the dialog box is not being ...