MDT 2012 UDI replace scenario

Hi,

I'm playing around with the MDT UDI replace scenario. Once the UDI wizard loads it fails on Copy APPDiscovery XML, Copy Printers XML and Copy ProductList. tasks.

The OSDSetupWizard.log tells me this:
...
12:26:41.549 06-26-2012 2 CopyFilesTask No source files match X:\WINDOWS\TEMP\AppDiscoveryresult.xml.app
12:26:41.549 06-26-2012 1 TaskManager Finished running task 'Copy AppDiscovery XML'. Status = 'Error', exit code = 1, task return code = -2147467259
12:26:41.565 06-26-2012 1 WizardDialogController Replacing the variable 'DriveLetter' with the value 'n:'. The delimiter was '$'
12:26:41.565 06-26-2012 1 WizardDialogController Replacing the variable 'OSDDataSourceDirectory' with the value '9038902d97ed7cdbcdcaeb9582ff3322'. The delimiter was '%'
12:26:41.565 06-26-2012 1 WizardDialogController Expanded environment variables: 'n:\9038902d97ed7cdbcdcaeb9582ff3322'
12:26:41.565 06-26-2012 1 WizardDialogController Replaced variables.
     Original string: '$DriveLetter$\%OSDDataSourceDirectory%'
        Final string: 'n:\9038902d97ed7cdbcdcaeb9582ff3322'

Looks like it simply missing the files. Any idea what I am doing wrong?

Thanks.