How many movies have David L. Wolper and Walter Scharf collaborated on?

They have worked on 3 movies together! Their first movie together was If It's Tuesday, This Must Be Belgium (1969) while their highest rated movie together was Willy Wonka & the Chocolate Factory (1971). They have not worked together since The Scarlett O'Hara War (1980). They are most known for their comedy films together.