virtualbox – Why vboxmanage fails to identify the OS in unattended install?

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When i run this vboxmanage script to create a VM and install guest OS. I get this error below. I am using this iso: AlmaLinux-9.7-x86_64-dvd.iso. And i tried three different OS types commands….

--ostype RedHat_64

and

--ostype RedHat9_64

and

--ostype Linux_64

But they all produce this error below. In this specific try, i am tried w RedHat9_64. The Vm gets created, but the unattended installation of the OS fails, and has to be done manually.

VBoxManage.exe: info: Preparing unattended installation of RedHat9_64 in machine 'Alma9' VBoxManage.exe: error: Unknown guest OS major version '9'

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