Cannot Complete Customization

I'm getting an error when deploying a VM from a template (XP Volume License edition w/SP3) saying "Cannot complete customization."

I've got the XP sysprep files in C:\ProgramData\VMWare\VMWare VirtualCenter\sysprep\xp. I am able to enter customization settings in the vSphere Client wizard. The template will deploy to a new VM without customizations. The VM fails with the error if I go through the customization wizard.

What causes this error?

Thanks,

Curtis