I deleted all the object and props from the file and created a moving camera to animate for 30 frames and I still get the error.  The on a hunch I cleared out the sound file I was using for the talk designer. When I did that it WORKED!!  I am not sure why it was rendering earlier ok and then suddenly stopped but "Clear Sound" worked. tks

Windows 10 - Poser Pro 2012 - 64Bit - 24GB RAM - 4 x 3.40 GHZ processor