@mary.maria is it the basic EFT bundle or the licensed OneWorld EFT bundle? Technically licensed bundle just unlocks all the EFT templates from the basic bundle so you can use it for more than one country. As far as I know you cannot use both of these bundle to generate EFT/ACH files evan for testing in SB, I had first hand experience while customizing positive pay template for multiple countries, at the end had to call my account manager and had him turn on the feature for the SB(it was failing everytime and weird messages from the scripts). It may be the same case here.