How many movies have Robert J. Schiffer and Robert Morse collaborated on?

They have worked on 3 movies together! Their first movie together was Oh Dad, Poor Dad, Mamma's Hung You in the Closet and I'm Feeling So Sad (1967) while their highest rated movie together was How to Succeed in Business Without Really Trying (1967). They have not worked together since The Boatniks (1970). They are most known for their comedy films together.