I am rendering an HDV project in PPro CS4. I have rendered 100s of projects on this AMD Phenom Quad Core 2.3 GHz computer with Win XP and 4 GB RAM. My Hard drives all have over 150 GB of free space. I always have to render these HDV projects in little bits or PPro crashes. But this time, after it crashed all my rendered scenes and FX now have red bars over them as they are now unrendered. How can this happen. If this keeps occurring I will never be able to render this job.
I had the same problem when I was running PPro CS4 on an underpowered computer.
I rendered in small bits. If I tried to render too much at once it crashed, sometimes losing already rendered clips.
My solution (I know, you don't want to hear it) was to get a more powerful computer. And while you're at it, you may want to consider CS6 because of CUDA.