I have upgraded to vray 6 recently and I am getting error when I am opening my material libs. I assume it has something to do with phoenixfd ocean texture plug in some of my materials. I have not upgrade my phoenixfd to the recent version but if this is the case I am surprised that even this was taken from me with the upgrade to 6.
This thread should clarify things.
Besides the issue you’re having with the pluginNode, should the oceanTexture not work update the phoenix version you have installed to one that works with V6 (no need for a license.).