maybe not updated to the latest CUDA, as required?
Specs: Apple MacBook Pro M1 max 64GB 2TB, MacOS 12.5 / MacPro 5,1 with NVIDIA GeForce GTX 1080 8G, MacOS 10.13.6 / Mac Pro 5,1 with AMD RX5700 8G, MacOS 12.3.1 / HP Z600 with NVIDIA 3060 RTX 12G, Windows 10 pro + Netstor GPU box, 4 x NVIDIA GTX 980ti 6G.
Yes, probably you need to update the NVIDIA drivers to the latest ones available. What do you get if you open the GPUs configuration in the plugin options panel? Can you see any GPU there?
Yes, the problem is probably that you don't have the right NVIDIA drivers on your system. Please, go to nvidia.com, download the latest drivers version for your GPU and install them. http://www.nvidia.es/Download/index.aspx?lang=en
I have downloaded the most recent drivers from NVIDIA. Unfortunately I am still getting that error. LightWave 2018 only.
Do you have any other suggestions as to why this might be happening?
Well, after a lot of tests here I can't understand how it is possible. Are you sure that you are using the same plugin version in LW2015 and LW2018, the latest 3.08.0.9 one, for example? I'm testing the plugin here using LW 2018.0.3 and the GPUs are there, as expected.