The open viewport that displays the real-time rendering of octane plug-in It's disappeared ,
but the single rendering works.
Someone already had the same problem?
Thank you
P.S.
I have upgrade win7 into win10 and everything worked for weeks.
Now i have uninstalled (old win7) and installed (New Win10) drivers of my Cards "One"Nvidia Quadro 6000 and "Two" Tesla C2075 and the viewport don't works more.