As of Arnold 4.2.3.1, the minimum Windows version is Windows 7. We no longer support Windows versions before Windows 7 and Windows Server 2008 R2.
This applies to all plug-ins (such a MtoA 1.2.02 and later, or SItoA 3.4 and later) that use Arnold 4.2.3.1 or later.
If you try to load an Arnold plugin on an unsupported Windows, you’ll get an error (something like “The specified procedure could not be found”).
On Vista with Arnold 4.2.3.1 or later, kick -nodes gives you a more specific error:
"kick.exe - Entry Point Not Found" "The procedure entry point SetThreadGroupAffinity could not be located in the dynamic link library KERNEL32.dll."
