NVIDIA 418.81 driver (Feb. 4th) doesn't work with Octane - please don't update yet! We are working with NVIDIA to fix ASAP. We need to recompile Octane 4/2018.1+ to work with this driver version, and will post an update to this thread once that is done and confirmed working. Thank you!
If you have updated to this driver, here is how to revert: viewtopic.php?p=356426#p356426