Hello,
I have compiled a special build of the Octane plugin to be used with Lightwave 11.6 pre-release until we fix the SDK issues of this LW version. It is only available for Windows x64.
It has not been tested in deep, so perhaps it could have more hidden problems, but at least here it works fine.
You only need to replace the LWOctane.p file of your current 1.20.1 plugin release with this new one.
-Juanjo
EDIT: You have the last plugin release in the last post of the thread.