I was able to teach my Pronto all of the madVR Envy’s IR codes. Earlier, when I was teaching the Pronto, I was holding the Envy remote about 4” to 6” away from the Pronto.

This time, I held the Envy remote less than 1” from the Pronto. This time, the Pronto learned all of the Envy's infrared codes just fine. I don’t have an extra pair of batteries around to test, but I suspect that the batteries that my Envy shipped with may be weak. They work strong enough for controlling the Envy, but not strong enough for teaching the Pronto. I recall having this problem with another device many years ago…