How many movies have Barbara Harris and Robert J. Schiffer 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 The North Avenue Irregulars (1979). They have not worked together since The North Avenue Irregulars (1979). They are most known for their comedy films together.