Today I was successful at transferring a file or 2 both uploading and downloading into my DM 2400 from my Predator software included in my BobCad V23. I did have to change a wire or 2 to make this happen. I could not upload and download with 1 wiring set up yet. Dyna's information and wiring diagrams in the manuals or elsewhere have been anything but helpful and incorrect in the wiring of the RS232 port on the machine. It looks like this will be a reality very soon on my ability to transfer both ways and use this wonderful machine just as it is. The conversational language looks fun actually. Easy to understand at my level. I will update when something else is discovered.