@cadfather said:

it looks so weird that it doesn't seem a vray problem (at any rate i never experienced anything this bad, and when it fails, a restart or importing the model into a new empty file does the job).

Hi CadFather
You are right,it wasn´t a Vray problem ...In fact after my post I start a new sketchup file within the same open session, rendered it with the existing vray settings and magic..it works like a charm.
Conclusion - It was a Sketchup problem
Then I visit the book http://www.aidanchopra.com/book-info and made a complete new set-up of shadows and geo-positioning of model and after a few tweaks the model is back rendering without problems - see sample.
Thanks for your input

Dear Vray experts
Unexplainable the renders on the model I am working in start getting Bluish as can be seen it the attached picture...
I am for 2 weeks playing with the settings and can get no improvement..
I tried with previous versions of the same model I did last year and worked fine with normal colours..
Does any one of you experiment such challenge?
I don't know what to do more...I am desperate
Any help will be highly appreciated
Jose Palma

http://technet.microsoft.com/en-us/magazine/ff431742.aspx
For whatever reasons Windows7 doesn´t allow winrar - in my case - to unpack the files to the plugins directory.
Follow the above recomendations allowing winrar to run under administrator rights and it´s done.Hope iy helps

Dear all
Just installed Stray Lines plugin but now I am not able to get ride of all the labels flying around...even in same cases the arrows are pointing for some stuff I am not able neither to see nor delete..
Any input will be highly apreciated