Wow . . . it's working again and the solution was rather obvious. though the cause is completely unexpected.
I disconnected the usb/ethernet adapter from TiVo and hooked it up to my laptop. Then I started playing songs from my Media Server. In a minute or so, I started getting IP Address Conflict errors. I released and renewed my DHCP lease, but that didn't fix it. So, I rebooted my machine. Presto - it works. Which gets me to thinking . . .
I shut down TiVo, reconnected the USB adapter and restarted. And voila it's working. So I go and check the server console and sure enough, wherever I died with the IP address conflict I had the tcp_write error=10054. So, I think the error was rooted in a TCP/IP address conflict.
Which means, if I'd done the obvious "reboot the machine" on TiVo, this would have been fixed five days ago. Hmph.
It's interesting, though, that this interrupted MC but neither the TiVo desktop nor the regular program updates. I could believe that there was some other protocol connecting the TiVo desktop to the TiVo itself which made it immune to these errors. That falls apart when it comes to program data. Maybe it was too short a connection to suffer this failure?
Anyway, that's it. Gotta tell ya, I really do love MC. It's a sweet piece of software that does just about everything I could want with my media collection. I'm really quite taken with it.
I'm also really stoked about your responsiveness in this matter Jim. I mean, it's a Friday evening/Saturday morning and you have been working with me on this. That's pretty cool. Thanks a lot - I'm sure you have better things to do with a weekend.
Well, I'll be telling any TiVo owner I know that MC is really the thing. Matter of fact, I think I'll tell anyone who has a media collection the same thing.
DonJefe68