As the name suggests this morning I update Cinema 4D to the latest version - 2026.3.4 and after the update I can’t open a .c4d file with vray.
If I try to open other file without any vray object or option activated it’s all good and is working.
Does anybody have the same issue?
I can send the .txt file if needed.
Hey @francisco_seisdedos , this is unfortunate, but I can not reproduce your problem on my side. Can you please send the mentioned _BugReport.txt file and optionally a scene which triggers this crash.
Additionally, can you try renaming your Cinema 4D preferences directory temporarily, to ensure there are no problems there. If the crash reproduces you can safely rename it back to its original name to restore your preferences.
Hi.
I think is the file because I had tried to open other file and it’s all good.
Can you confirm?
https://www.dropbox.com/t/Omo4vOTHQHSn79VD
How do I rename the Cinema 4D preferences folder?
Yes, it seems to be scene-specific, and the crash here is caused by Chaos Scatter, so renaming the preferences won’t help. However, for me it seems to also happen on other Cinema4D versions.
Hey @francisco_seisdedos , as mentioned by @bozhidar_ivanov - changing the preferences will not help in this case. While we investigate further the cause of the problem, you can still work on your scenes with latest V-Ray if you disable the Chaos Scatter objects in your scene.
Since opening the scene to disable them is the initial problem - you have two options to do this:
The first option is to uninstall only the Chaos Scatter plugin from your Cinema 4D version. The open the scene and disable or delete all Chaos Scatter objects from your scene and re-save it.
The second option is to open the scene with a python script which disables the Chaos Scatter objects and saves the scene back. I attached the necessary script to my reply, you will need to run it with Cinema 4D’s python interpreter, with your scene as command line argument to the script. Important - copy your scene before running the script as it will save it over your original scene, or you can add a second argument to the script. Here is an example command line you can start from cmd.exe:
"C:\Program Files\Maxon Cinema 4D 2026\c4dpy.exe" c:\sources\disable_scatter_viewport.py c:\scenes\crashing-scene.c4d
You will need to replace the two paths (for the script and the scene) with the full paths to where you extracted the script and to the scene on which the script will operate onto.
disable_scatter_viewport.zip (1.3 KB)
Thank you both!
I had a file that generates the one I sent you and works fine with everything I had so I was able to use it to continue the project and ignore the other one.