An export format or a method of payment with an export format must be specified

An export format or a method of payment with an export format must be specified. To reolve the error I had to move the current execution point from the CustVendSumForPaym class, constructor method “custVendSumForPaym.getLast();” Line to avoid looking in the cache (SysLastValue) and retrieving a payment method format that does not exist. I was asked to rename a file format method text that I had created, and had referenced this class during my testing. I tried both clearing the cache and restarting the AOS but was unsuccessful attempting to remove the reference to the previously selected payment settings.
The source of my woes.