Sketchup Vray rendering very slow and strange things happening


I have been modeling a building and was rendering fine, until all of a sudden I rendered and it took ages to start rendering. Also after it finishes rendering sometimes it renders fine, while at other times only 2 objects appear and the rest appear all white.

This keeps happening all the time . In my opinion , I believe it is a bug , however I do not know how to remove it. Anyone can help me please?

Have you tried re-installig your sketchup and vray? I had that problem before but just re-installed it and everything started workig fine again. Also you can also open your output settings and reload the default vray settings.