VRayDisplacementMod gives a "Warning : scene is empty&q

I have tried everything and I still get this error message.
And the object with displacement disapear :shock:

My system unit is “meter” and my display units “cm”. Could it be the problem?

Check the mapping coordinates on the displaced object and make sure there are no faces on it with the exact same coordinates for all vertices.

Best regards,
Vlado