At the end of the cleaning process, the robot vacuum cleaner always returns to where you started it from; either the base or the point in the home where you first started it.
If the VR200 has been picked up during cleaning and moved to a different place, the robot won’t be able to orient itself.
Start a spot cleaning cycle from the base to see whether the robot finds its way back to the base and docks.
Alternatively, or if the robot doesn’t dock, the base should be tested out in one or two places in different directions from the starting point.
Docking often works perfectly once the base has been repositioned.