invoice neither selected for payment nor rejected

Hi,

we are in R12.1.3 and i have created an invoice for £20 and a credit Note for -£80 for the same supplier and site, when i run the PPR these invoices are not selected for paymen and also not exists in ap_unselected_invoices_all or in iby_transaction_errors. So user will not no that some invoices are not being paid.

(in our case invoice is paid from one Internal Bank account and credit note is being paid from another internal bank account, so user expect /want the invoice to be paid)

PPR template is fully automated i.e. once submitted it creates/completed the payments and we haven't selected "maximize credits", as zero payments are not allowed for this PPR.