F110 - Error 006 (No Valid Payment Method Found)

Dear Experts,

During Automatic Payment Program, i am facing above error on my Vendor Line Items under exception list. Although i have maintained Payment Method and House Bank on Vendor Master Data as well as on individual Invoices at the time of Invoice Posting. Again i order to double check, i have copied document number from exception list and checked through FB03 and found Payment Method mentioned on the said document.

Can any one guide me where i am mistaken?

Regards,

Hadi.