@gailium119, This was my last try and I was able to advance up until Installing features part. I'm getting this error. Do you have any idea? Code: 2022-03-12 17:48:11, Error [0x060126] IBS CallBack_ImageWasSelectedInUi: An error occurred while removing the MultiEdition key from the blackboard.[gle=0x00000490] 2022-03-12 17:51:21, Error IBS InstallEditionPackages: Failed to get PackageManager object; hr = 0x80070003. 2022-03-12 17:51:21, Error IBS CallBack_ConfigureWindowsFoundationImage:Failed to install edition packages; hr = 0x80070003 2022-03-12 17:51:21, Error [0x06043b] IBS CallBack_ConfigureWindowsFoundationImage:An error occurred while configuring the Windows foundation image. GLE is [0x3]
Q: Where to get to know about Parent and Virtual? A: C:\Windows\servicing\Editions\EditionMappings.xml.
From your replies, it seems that you are doing Unstaged image, not Unstaged iso. Either ways, I found that both C:\Windows\assembly\NativeImages_v4.0.30319_XX, if not originally generated, are not able to be updated by ngen.exe.