Lyndel, appreciate your thoughtful response.

The control system I'm reselling can only learn IR codes. Cannot import them. The learner is very reliable, however, as we know, discrete codes aren't found on most handheld remotes...........so...........I have a couple learners that can accept Pronto hex i.e. Vity and the TSU3000 and when necessary have been cut pasting into those learners and then verifying onto my control system learner and.........this process normally works fine.

That is until Xfinity X1 STB's came along.

As I've learned through perusing past posts Xfinity uses an IR protocol called XMP. This protocol is nearly impossible for most IR learners to learn. Even when I cut paste the Pronto hex into my Vity and TSU3000 and try verifying onto my learner...........nada every time....IR learning failed error message.

At this point I'm done wasting any more time on this.

I will say, though, that it has been a learning experience.