Turbosmooth/Relax not working on V-Ray GPU

[rimantita]

I have the same problem.

I am trying to follow these steps to resolve it : 
''Create a tyMesher, set mode to "input geometry" and select the tyCache. Then put the smooth on the tyMesher instead.''

However, I don't understand how I can select tyCache? Did you mean I have to select TyFlow object (in which case it doesn't seem to work)?

Thanks