Here's the reply from the artist :
"Thank you for your reply. My GPU is: GeForce GT 330M. My driver Nvidia is : GeForce 320.49
I activated the "Verbose mode" like you said to me, and then try to reassign an Octane material with the script editor opened. But it's still freezing. I cannot make a print screen when it's freezing, but there are no message wich explain what's happened, just a message that says that OCtane Material diffuse was assigned to a mesh."
Thanks
