InfoPath Dev

I hae an adress field in my form. I need the user to fill this field out. I am noticing some users are not fillling this part of the form out. Is there a way I can make a rule that will make it manditory to fill out. For example The form will not submit if the field is not filled out?

Hey Dave,

Use Data Validation.

Which version of IP are you using. It is done slightly differently depending on what version you have, but if you look up data validation you should find it no problem.

The validation condition you will want to set is: If my:FieldName is blank.

I am using 2010... I tried the action rule "display message"  when adress field is blank...... and then I put the text box properties as "cannot be blank".