AR refunds - can't generate remittance advice

Hello,

I have created a refund in AR and the invoice has been created and paid in AP.

I am trying to generate remittance advice, but the program completes with no output.

An earlier discussion provided links to the following:

How Can We Send Notifications To Supplier ( Customer) For Refund Process In R12 [ID 1313343.1]

R12 Generate A Remitance Advice On A Supplier Refund Payment [ID 1545176.1]

The first document seems to be related to modifying an email address and also the patch link is not available for 12.2.x (we are using 12.2.10).

The second document seems to relate to AP refunds.

TIA