I maximized the RAM and still get this message when bouncing (or sometimes, even during playback), even with all other applications closed (lots of logic-based fxs open, however). I reduce the number of voices on the soft synths and turn down the levels, but sometime still get this message even when there is no Core Audio, only MIDI Currently Platform: G4 Dual 450's 1.5GB RAM 12 analogue MIDI synths connected to 1 unitor 8 and 1 amt 8 Audio via MOTU A/D 24i Let me know if you have any similiar experiences and your resolution. The concern is when I run two or three outboard synths via MIDI simultaneously, it will overload again. Hope I don't have to upgrade CPU. Regards, Uro