I don't mean to dig up a dead horse of a thread, but I figure I should update the solution for this for anyone else that had/has similar issues that I came across!
Basically I had to try as many different MIDI interfaces I could until one worked in transferring the DigiPro Waveforms. In my case, my Korg MicroKontrol (of all things!) was the MIDI interface that worked. My MOTU 828MKII, my Saffire PRO 24 DSP, my MicroKorg, and my E-MU XMIDI 1X1 USB MIDI, all failed in transferring the DigiPro Waveforms.
Daniel from Elektron basically kept telling me to keep trying as many MIDI interfaces that I could (and of course kept suggesting the TM-1, but I just didn't have $115 to spare on another piece of gear at the time).
So if anyone out there gets the "ERROR: Incorrect Length" when trying to transfer DigiPro Waveforms to their machines, try as many MIDI interfaces you have until one works, the only two that are guaranteed to work at this point are the Elektron TM-1, and the Korg MicroKontrol.
For all the MIDI interfaces I mentioned I tried using both Mac OS X 10.6 and 10.7, and the MicroKontrol transferred on both operating systems.
Anyway, I wanted to thank everyone that helped me on this thread, and gave me suggestions! It's nice to have this community around and have so many people willing to help you out. It makes one feel not so quite alone in the both the digital world and regular world!
