I'm not even entering any information. I write a quote for a customer and when they purchase the unit, I turn the quote into an invoice. When they pay I highlight the invoice, click on "Payment" and that's when I get the error. I haven't entered any information since the initial quote. In the past, the customer info from the quote was saved (I assume - since I've never had to add customer's before). I'm trying to contact the NCH Software team, but it tells me to post here.
Jeannie