OK, now..... If in the Animation Tab, I deselect refresh Geometry and select refresh scene, and it makes it to the end of animation. On a simple animation, it's ok, but on a more complex animation with more figures and scene elements, it ads more time to each frame rendering. Why won't it make it set to refresh geometry? It's much quicker. UGH!!!! Losing my patience with this. I have clients waiting, and I have nothing but problems.
Thanks for that info - that helps a lot. I'm running more diagnostic tests at the moment to try to isolate the issue, and Otoy are working on this at their end, but it's not a simple thing to fix, since on my PC it takes at least 2hrs to reproduce the issue, so tracking down potential causes takes a long time. Again, you are running a very low-end card, so if renderspeed is an issue doing a complete scene refresh, you can add another more powerful card for rendering.
I'll keep you up to date on any developments.