If a new CompactFlash-based JACE-NXT, it is recommended that you first disable EWF (enhanced write filter) for the “System” drive C partition, followed by a reboot, before starting commissioning. Do this with a Windows remote desktop connection to the unit, by selecting from the Windows Start menu:

Start->AllPrograms->ewf->Commit changes to C drive and leave unprotected

And then rebooting the unit before running the Commissioning Wizard. Following all commissioning, you must then re-enable protection on drive C. For related details, see Notes on EWF (Enhanced Write Filter) in Windows XPE and EWF use case examples.