Mike,
I finally gave up on NRPNs, they were just not going to work for me. However I've managed to break through with CCs so at last am making progress.
One thing bugs me though, which is the MIDI scaling from 0-127, so instead of sending, say, 0 and 1, for an on/off switch, it has to be 0 and 127. It means that all parameters on the GUI will be seen to go up to 127, even if they go up to only 15. Whilst my program will work fine, it would be more appropriate if the slider was shown to go up to the number that is the particular parameter's highest point. Could there be any workaround to this??
Thanks
Dan