Content Transfer Stalled

I'm attempting to transfer all of my OTA recordings from my Bolt to my 6TB Roamio OTA over my gigabit Ethernet network. The transfer worked fine for about half the recordings and then just stalled overnight. The remainder of the recordings are showing up as pending in the Roamio's ToDo list, but none are actually transferring now. I attempted to force a link to the TiVo network to jumpstart the remaining transfers. No joy. All other features on the Roamio are working just fine. No error logs either.

Any ideas on how to resume the transfers?