NPRN for Roland Arrangers (BK series, EA etc...)

If anyone understand this - could you please verify you see the same…

I am sending NPRN to turn off/on (mute) various parts - They all work fine except for the one associated with Melody Intelligent - I cannot figure out why or how to disable / enable Melody Intelligent
Any ideas or help would be greatly appreciated.

The ones in the lower green box all work fine - I tested each. The one in the top box does not seem to work as I would think….

Thanks
Greg V.

If you don't get an answer, you might also post this question on the Roland Arranger forum

http://www.roland-arranger.com