I've gotten that message. I'm on a PowerTowerPro 225 (mac clone) 320 K RAM. Fireworks and Dreamweaver usually leak memory, and if I run Poser after using either app, I get the error message you describe when I try to render in Poser. I use high res shadow maps, usually 1024+, render images at least 800 x 800 and give Poser at least 200 K of RAM. My guess is the usual Mac presciption: more RAM. --ratta