OSX netinstall error

Hey Folks,

I am setting up net-install on our OSX server and my test computer can boot from it. However, when I try to install the OS it gives an error saying it cannot unmount the disk. I tried creating a new image with the same results. I also tried changing the NBImageinfo.plist file from supportsdiskless false to true. That doesn't work either.

Does anyone have any ideas what the problem might be ?

Thanks!