Hi [NAME].jolly , my issue was also apparently a problem with the USB device I was using (SanDisk Ultra USB 3.0).  I have been able to successfully install the same image on 4 different Dell models, using a new USB device.  Thank you [NAME]-Tyler M for your assistance on this!
I was able to: Download the current image assist software  1. created a bootable USB  2. Boot the source Dell 3000 from the USB, and create a Static .wim file  3. Boot to the target Dell 3000 from the USB and start the restore.. the restore begins then... It gives the error typed in the subject. Any idea why this is not working? Thank you.. stephen  
ImageAssist: Failed to Restore #ApplyWimIndex Window Partition