Can't Move Show to Roamio from TiVo Desktop

Recorded a show on my TiVoHD from Xfinity which means it's in the new MP4 format. Wanted to transfer it to TiVo Desktop but couldn't do it directly from the TiVo HD (wouldn't download the whole file) so I had to first transfer it to the Roamio and then transfer it to the TiVo Desktop. However, if I want to move it back to the Roamio from the TiVo Desktop I get attached error message.

Any thoughts on why this might be happening?

Attached Images

20160717_224327993_iOS.jpg (27.5 KB)