it seems that vray rt depend on cl_nv_compiler_option extension. ask for support from vray manufacter.
its not vray rt depend on opencl. its purely graphic card compiling error. this is amd 7000 series not working with vray rt opencl engine. please give me right solution to solve this problem. thanks
Have you sorted this out?
If not, I maybe have the solution for you. Just make sure that the directory "c:\program files\chaos group" is not in "read-only" (right-clic > properties) and that all the users of the computer have a full control access of that directory (still in the properties > security tab > and there clic sur "edit" and check all the checkboxes in the "allow" column. Do this for all the users that you see).
This solved my problem.
I hope that could help.