How To Void Partially Applied AP Payment in Microsoft Dynamics GP

When an AP payment has been partially applied, it cannot be voided in the normal manner. Here is what needs to be done:

1. Create a dummy invoice for the balance of the payment.
2. Apply the payment balance to the dummy invoice, fully applying the payment and fully paying the dummy invoice.
3. Use Void Historical to void the payment (reinstating the invoices that it paid) then void the dummy invoice.