I have the very same problem with you, and I don't know what caused it, but at least I've found a way to "fix" it.
It seems there's a glitch on the material/nodegraph editor that causes the problems.
You can look at the "first material/material 1" node/section. And then see the "texture 2 / RGB ...

Great! Thank you for the reply!

I plan to upgrade my GPU to pascal's GTX 1080, is it supported by Octane now?
I read some of the comments that pascal card are supported now. (the stand alone)
Can I use it with the Daz plug in ?
Is it only for Octane V3? Can I use it on Octane V2?
Thank you.
Sorry for my English.

For some case, that would still be a better solution rather than keep everything like this (uncertain). At least the company make a decision and take a responsibility to their costumers.
It looks silly on a short term, but not on the long term.
This case is pretty common on transportation business ...

Who has the rights to the plugin? I would assume otoy would have them exclusively, so why cant they just give the project to another developer?
This is a third party plugin. So it's not owned by Otoy. That is where part of the complications come in. Otoy didn't do the work. While a lot of Otoy's ...