It seems that the Korg NanoKontrol is not the most reliable device for controlling Reaper. I always have a hard time getting it to work and it's never reliable.
Followed the instruction shown here (post #5)
https://forum.cockos.com/showthread.php?t=93503
The Korg Editor recognizes the device. Reaper recognizes the device in MIDI. But it wont function. Play, REW, FF, none of them work.
It might have something to do with the Instruction regarding the "Actions List" in Reaper and loading the map. The interface might have changed.
Does yours work? Is there some other docs I should look at?
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Tips For Mfg
www.tipsforcadcam.com - ASUS Extreme III / Intel i7 970 (6Cores)
Steinberg UR44C Interface / 2GB NVidia Quadro FX5800 / 12GB Ram / Win 10 / Reaper 64 V6.8
MIDI Guitars: Ibanez IMG 2010 w/ Fishman TriplePlay