Running Automatic Receipts and Remittances process in R12

We are in the process of development/testing for our R12 upgrade,  As part of this, we are trying to setup the automatic receipts and remittances process to work similar to how it works today in our 11i prod instance.

I did the minimum funds transfer config required for R12 as per note 471418.1. 

I also followed all the instructions indicated in note 745996.1.  However, this note does not indicate how to create/check the remittances file that needs to be sent to the bank.  I was expecting to get a file created on a given directory but it did not happen.  So, my question is:  after you have successfully submitted/completed the Automatic Receipts create/approval/format, and the Remittances creation/approval/format, what else needs to be done to get the remittances file created?  We setup the "dummy" payment system to write the file to disk.  How do we get it to create the file?