[GNC] Strange Error Message

[Robert Simmons]

If I use the process payment feature on an invoice to a customer, and then
go to the checking account the payment was processed to, and then select
the row for that payment that was created by the process payment process,
then right click and "Edit Payment", there is an error popup:

"You have no valid "Post To" accounts. Please create an account of type ""
before you continue to process this payment. Perhaps you want to create an
Invoice or Bill first?"

Is this a bug? The error message does not make sense.