VERIFIED SOLUTION i

Resolve issue where Object > Erase does not produce expected results when using a Rectangle

Products affected: MapInfo Pro™
 
Pro users should not use a rectangle, ellipse, or rounded rectangle for object processing operations. These are simple drawing objects for display purposes and are not accurate for object processing. Rectangles are simple geometries defined by two nodes.

In some cases (such as other projections) this may work correctly but for accurate object operations such as Erase then Region objects should be used.
UPDATED:  September 19, 2017