How come when I use multichannel out it works fine until I try to put the channels below the vst (track 2) into a folder, then I get no output. It seems the audio channels are still the same. The tracks were created using "Insert virtual instrument on new track"
Do you mean putting tracks 3 (to 6?) into track 2, making track 2 a folder? If so, then that is s feedback loop and muted by Reaper. EZ2 creates audio, sends it to tracks 3 to 6; those tracks all are routed to their parent (track 2). Track 2 is sent to track 3 again, back to track 2 .... You could put all the tracks into a new one.
How coincidental...... v5.71pre4 - January 1 2018 + FX: ensure no feedback loop created when building multichannel routing on a folder [t=201177] It pays to run the latest builds.