Hi, I've tried to build a pharovm with multithread support. I changed the config in the pharo generator.image to use the cogmt config and was able to build a vm. But this vm crashes on startup. (windows7) Is this the right way and did anyone got this to work (windows or linux)? And can this work to make NB callbacks working for multithreaded libraries. (I made some simple bindings for the gstreamer lib with NB, this works for simple calls (create element/change state). But I guess this won't work for any gstreamer function that requests a callback that may b e called from a different thread) Would this be the right way to do: - build a vm with MT support - guard the NB callback entry/leave code with the ownVM()/disownVM() call. Or is there more to do. Thanks in advance nicolai