New in 3D Mates
Replace Mate References Improved
SOLIDWORKS 2016 allows designers to replace a missing mate reference whenever a mate loses its reference due to geometry changes.
After replacing the Mate Reference for one mate, a dialog box offers the option to replace the reference in all other mates with the same missing reference.
For a detailed explanation of this new feature please download this PDF. What’s New SOLIDWORKS 2016: Globally Replace Mate References