Only the selected objects to render

[DeltiX]

I'm working on Sketchup 8 and V-Ray 1.6. For over a week I sit on the project. From time to time it happened that not everything is redner. So far, enough to restart settings in v-ray and everything returned to normal. At this point, nothing helps. I went back up to an earlier version of my model. I've done over these things that I lost, but after some time again appeared the same problem. Chasing me deadline. Until June 20 I need to have a finished project. I will be very grateful for your help. There is no rule as to whether the components, proxy, or normal subjects.
Below is a picture showing the problem.

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[valerostudio]

1.6 was a beta and that is over now. We are now on 2.0 and this was a bug that was fixed.