As mentioned the last nvidia driver is making cuda errors, going back to the previous one : no cuda errors but still houdini crashed at the end of the render.
No problem with the IPR at all with the previous nvidia driver.
I've reinstalled WINDOWS...
currently reinstalling everything so i will be back about that this evening probably
It's a two days lost i like that
The last windows update made me out of the game in terms of authorisations to write/modify files and folders on disk no matter what i tried /
( and there is a lot of forums posts whit various methods to solve, pointing windows on that errors while updating it )
modifying authorisations was immediatelly back to "you are not allowed to write" no matter what i tried /
just a simple windows update and then you're out of your own computer.
Now Octane and Houdini related,
I guess that if everything is going right till the end of the render where writting the file seems the only step left then this is windows...
Problem was that this happened while updating first windows, then houdini and octane and then cuda and nvidia drivers ...
i had to try all but windows as this is the longuest task /.
Have a good one JuanJgon