Recently installed 1.4 version of octane since 1.5 was crashing on my also. When i enable the live viewer in the octane window its crashing with this output in the bug report seen here, https://pastebin.com/gARZg26L When i started working on the project it was working fine but when i closed the project and reopened it, its starts crashing on enabling live viewer. Its not a heavy scene but i do have a composite material with 5 sub materials attached to it.