Local renders perfectly fine, farm (vrscene gen) submissions hang

[bender83]

I have a very large, very complex scene (repro not an option) - that renders fine locally, but when I try to export a vrscene it hangs (ostensibly) indefinitely... what sorts of things should I be looking at that come into play when vray exports a vrscene VS a VFB render? I was under the impression that rendering via the VFB required vrscene creation 'under the hood' regardless, but perhaps I'm wrong? If I can understand the difference between a local render and exporting it might go a long way to finding the issue in the absence of a repro file.