InfoPath Dev

 I figured it out...because the rule was running on the different section instead of where I was originally placing the attachment, my path changed.  I should have had: count(../my:MileageExpenses/my:expenseLineItem

I'm working on an expense form that requires receipts for expenses to be attached unless the expense is a parking meter, in which case no receipt is required.  The expense claims are in a repeating table, with a field for mileage, a field for expenses, and a checkbox to indicate if it was a parking meter expense.  The form is laid ...