1. The 4-4 Vendors (Accounts Payable) record has Separate check for each invoice selected on the Invoice Defaults tab.
2. The vendor's 4-2 Payable Invoice/Credit record has the Secondary Payees set to pay the same amount as the vendor.
3. The 4-2 Payable invoice/Credit is assigned the  Status of 2-Review or 3-Dispute 

Solution 1

1. Open 4-4 Vendors (Accounts Payable)
2. Display the vendor record.
3. Click the Invoices Defaults tab.
4. De-select Separate check for each invoice
5. Click Save

Solution 2

1. Open 4-4 Vendors (Accounts Payable)
2. Display the vendor record.
3. Click the Open Invoices button.
4. Click on the row of the invoice.  Click the Drill Down button.
5. Click the Secondary Payee button in the footer of the record.
6. Remove the Second Payee, Amount, Paid, Balance, and To Pay information.
7. Click File, Save
8. Open 4-3-1 Select Invoices to Pay
9. Set the Invoice and the credit memo to pay and print the zero check.