Hi Mario.

Try do keep the poliphony counter "on" and then play the song that had problems.
Then , try to play each voice(R1,2 and 3) as single voice while monitoring the poliphony.
I think that the problem may be an great amount of effects that can duplicate or triplicate the poliphony.
You must to try effects in ACC. parts.
I tryed some simulations with big bands and 3 (R1,2,3) voices and the poliphony was 100/118
Regards
Chico.