Random render crash (###_lights.vrscene)

[Wolf3D]

Hi, I've a problem during a animation distribuited rendering (all nodes with windows 7, blender version 2.65, 2.66). Without apparent logic the render crashes at a random frame (5 of 100, 83 of 150, it seems related to my presence, when I'm not in front of the monitor, it crash ); the percentage of complete render without this error is about of 30%.
However in the console, Blender tells me everytime that it can't write on file xxxx_lights.vrscene (it seems to be related to a write protection). I don't understand if it is a problem related to windows file management or Blender that play wrong with write permission.
Does anyone have the same problem?

[bdancer]

Re: Random render crash (###_lights.vrscene)

Hm... there were stuff like this a while ago, but it was fixed... Are you rendering with animation option like "frame by frame"? Or running blender from command line with exact frame specified?
This error could appear if vray is still running and it tries to export next frame.

[Wolf3D]

Re: Random render crash (###_lights.vrscene)

Yes, it appears when I render in frame by frame mode.

[bdancer]

Re: Random render crash (###_lights.vrscene)

Ok, will check it again, btw also check your patch, may be it change smth in that area.

[Wolf3D]

Re: Random render crash (###_lights.vrscene)

Finally I was able to replicate this error; as you told, vray process with large scene (about 20Gb of ram) takes a lot of time to be killed (some seconds), so windows blocks the access to the files.
I temporarily resolve adding a wait time before the new writing of the file. It seems to work, but in next days I will code a more elegant system to prevent this (I think with a try-except), if you have not done yet, thanks

[Wolf3D]

Re: Random render crash (###_lights.vrscene)

Updates to the problem:

the patch that I've pulled works, but the problem occurs another time. But now when I try to delete the vrscene files, Windows doesn't allow me, also if I close Blender and if I kill every vray process (before my patch I was able to delete these files without problem). I've investigated which process maintains opened the vrscene files, it was system.exe! So I have to restart the pc every time to kill this process.

But today I found that when this problem happens, a node of the distributed render is crashed. If I kill the vray slave on this node, system.exe in scene node releases the files.

I forget to note the error code of the crashed node... I hope (or not ) it will happen in the next hours of rendering.

I think there is no solution for that, or am I worng?

[Wolf3D]

Re: Random render crash (###_lights.vrscene)

Et voilat, the error
ntdll.dll code c0000005, my classical nightmare also when I programming
It happens when a program call a not allowed memory address.

Tonight I will try to render without this node.

[attachment=0:3duxghzs]error.jpg[/attachment:3duxghzs]

[Wolf3D]

Re: Random render crash (###_lights.vrscene)

Last report: hardware problem, maybe the thermal paste of cpu was too old and the temperature has made the system instable. Now with the new paste it seems to work good.

[ehsan_wwe]

Re: Random render crash (###_lights.vrscene)

i have this problem for my last coposit render with big size
but when i see this error and close it i see at taskmaster vray is running and vray use the memory and chang value of it
i decide to wait for it
after 2 hours i see final render
( my error just close consool and vray standalone was opened )