In the Render Options there is a setting called "Bucket Size" It effects how large an area Poser renders in one bite. The bigger the bite the faster it works, BUT the more likely it is to have memory problems (These are supposed to be fixed in SR 4, fingers crossed). So, when you are rendering a long animation, especially unattended you should set the bucket size to aroung 16. This will greatly reduce the chances of it render getting stuck. Nerd