Thank you for answering.
That's the point, Bristol Jonesey: if I open 2 instances of EWQL as simple instrument tracks, that's 16 MIDI channels, so I can't open other instances. I find it too uncomfortable to bounce it all when I want more than 16 tracks.
I suppose the only way to open other instances of EWQL is to select "all synth audio outputs" connected to only 1 MIDI track, but I miss the reason why it doesn't work for me.
Can you tell me how do you manage to open 9 instances, please? Thank you!