Bitap "(null)" returned an invalid color (the most terrible thnk than can happe)

V-Ray V-Ray for Rhino V-Ray for Rhino :: Issues
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Bitmap"(null)" returned an invalid color (rgb -48346624.000000 64462288.000000 128924592.000000)

when I get such message in the status of the render.. it goes exremely slow..

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Re: Bitap “(null)” returned an invalid color (the most terrible thnk than can happe)

ok, I discovered that this happens when I have bump of 5 units..(in my case).. and increases the rendering time a lot