"Child of Light has stopped working"

[Natefarious]

So I think either Windows 10 or my Xeon 14-core processor are an issue for Child of Light. The game worked fine when I was running Windows 8, but since upgrading my CPU and OS, Child of Light crashes when I launch it. It doesn't make it to the game menu. I have tried uninstalling and re-installing it, as well as removing the settings files from "Documents\My Games\Child of Light" but neither make any difference. In the Application Event Logs, this is what gets recorded:

Faulting application name: ChildofLight.exe, version: 1.0.0.0, time stamp: 0x53922693
Faulting module name: ntdll.dll, version: 10.0.14393.0, time stamp: 0x57898d9d
Exception code: 0xc0000005
Fault offset: 0x0003f793
Faulting process id: 0x2ea4
Faulting application start time: 0x01d1f054a4458bd2
Faulting application path: G:\Games\Steam\steamapps\common\Child of Light\ChildofLight.exe
Faulting module path: C:\WINDOWS\SYSTEM32\ntdll.dll

Ubisoft technical support has just been suggesting random things that have made no difference. I point blank asked them if the game was known to have issues with Windows 10 or high-core count CPUs, but support ignored my question and instead suggested I remove and re-install the game again, using a registry cleaner if anything was left behind (for the heck of it I removed/reinstalled, and nothing was left behind so no need for a registry cleaner). I think Ubisoft is grasphing at straws. Is anyone else seeing these issues?

[Natefarious]

So I've had a ticket open with Ubisoft support since August 6 and they've done very little other than gather some info from me, nothing they've suggested has helped. My hundreds of other games (including other Ubisoft games) all run fine. I reached out to Ubisoft Montreal to see if they'd help at all (since they developed it), but this is all they had to say: "We are deeply sorry to read this. The customer service are the ones to contact for they are the ones best equipped to help you."

[Pablo]

have you tried running the game at WIndows 8 or windows 7 compatibility mode ???

Also , by just unistalling the game , and manually removing the files that where not unistallaed , you are not removing them from the windows registry ,thats why they suggested to you to use a registry cleaner . If compatibility mode doesnt work you can try the registry cleaner option

[Natefarious]

I had tried compatibilty mode to no avail. I regularly run CCleaner to clean up my registry, and because why not, I just uninstalled Child of Light again, ran CCleaner and cleaned up the registry (one key related to Child of Light was found and it looked inconsequential), reinstalled, and tested it again with no compatibility, Win 7 compatibility, and Win 8 compatibility. All crashed the same way, right away, on launch.

I just spent three hours and narrowed the problem down. Using msconfig, you can go to Boot -> Advanced and set the number of CPU cores. With trial and error, I can say that any more than 17 cores and the game crashes. 17 or under, it's fine. I'll update the Ubisoft ticket and see if I can get Ubisoft Montreal to patch the game and fix the bug.

[TeamMinchin]

Child of Light crashes on my Ryzen 3900X, it is due to too many cores. ProcessLasso did not help. https://steamcommunity.com/app/256290/discussions/0/558754898898645363/?ctp=7