While scanning there are times when an object falls off the scanner generating this message, or the object is not directly in the center of the turntable.
It might also be a cable that becomes loose. If using a USB hub or splitter, make sure they are powered or connect directly to the computer - only use USB 3.0 ports.
The maximum weight of scanned objects is 4.4 lbs (2 kg).
Verify cables, weight, object and USB connections and try again.
If it continues please reboot your computer and resume.
Contact support if you still experience problems.