So - is this form based on a database? That is - is the email field in the main data source or a secondary data source? From your screenshots, it looks like the main data source. :) It sounds from the error message like your formula is not always returning a value. You can put (temporarily) a calculated value on your form where you use the same formula to see if you have any data in the field. I'm guessing unless the form is querying for all the records in your table on load, you may not have a value, and may need to add a query data connection to your form to get back the email address you need. Does that all make sense?
Hilary Stoupa
