OK, reply to my own topic. I got the Sony S-1700 remote to send about a dozen "learns" before the UR server froze. Unfortunately, ALL of the keys apparently sent the SAME code:
This code does nothing, not even "blip" the IR. So I tried another method I've used to get problem IR codes. I used an old RCA universal remote to "learn" the Sony commands. This it did and can control the Sony. But when I used the UUIRT remote to learn from the RCA I (maybe not surprisingly) got the same code I "learned" from the original Sony remote. I'm at a loss to explain it. Anyone have ideas?