If I understand correctly, the difference between "analysed" and "raw" is that in the first case the IR datastream is analysed and a command extracted, and with raw the entire received datastream is stored.

Is that correct?

When I teach the Harmony IR commands, I position the remote about 2" from the Harmony and press a button on the original remote. 9 out of 10 times, I get an "Error Sending Data" message in the software and I need to press the button for a second time. This second time the software never fails to correctly "send" the data. It does not matter if I choose "Learn" or "Learn Raw". It happens in both cases.

What's causing the error message and what's the difference between the first button press and the second (in other words, why does it always fail the first time and succeeds the second)?