We are in the process of renaming existing tables (and a few columns within them) and then creating views to mimic the old table/column names. I got stuck for a few hours getting an error when I would try and compare the project to my local DB. After spending a few hours sifting through the refactor log I was able to find a workaround. If I dropped all of the new views (that mimic the renamed tables/columns) I was able to get the compare to complete and then apply all the changes at once.
The error I was getting: "Object reference not set to an instance of an object"