Thank yu for your answer Juanjgon,
I've given it a try, at first with no result :
(moving the octane.log file at C: root)
C:/octane.log or C:\octane.log (i don't know which one)
they both didn't work > not found / because of writting authorisations i guess.
So i've pasted it on the desktop C:/Users/PC/Desktop/ and now there is no more the issue > problem solved
i can move the IPR cam with quiet more ease now, (before there was those numerous lines of code in console loading the same camera several times on each clic).
(liveDB textures directory and localDB directory needed to be adressed too).
If you close the IPR while the render did not begin yet : houdini crash.
Have a nice weekend Juanjgon