This is quite strange...
I was working with several Kontakt players patched to midi channels. At first, only one of them played: glockenspiel. I checked them all, and they all played fine individually, but not with the project. The strange thing is, they don't play even when I get rid of all the other Kontakts, and even stranger: I can hear playback on the glock and simultaneous live performance on violin, but only glock will sound during playback.
I figured it was my RAM (256) which was a major problem when I had several Kontakts loaded, but everything's running smoothly with only one. Thus I did investigating. After restarting the computer and opening a brand new project, the violin in question still works live (pressing the keys or from a midi keyboard)... and it also works when I load up a completely different midi. I renamed the midi I was working on, and no good still. But the glock works for everything.
So to me... it seems like this violin (and a few other patches) simply don't want to play what I've written for them, as if they were disgruntled humans! This library is a little too realistic for my taste! How can I mend this?