What process prints AP vouchers?

We have a set of batches that were created and posted to GL for AP vouchers in regards to customer refunds.  We can see these voucher batches under accounts payable>control groups>group information.  The status on the batch is verfiied.  Our issue is that the batch was created and posted to GL, but they did not print.  Can someone give us a clue as to how to kick these off to print or where we need to look?

These have a due date of tomorrow, so please help soon.