How many movies have Hans Knötzsch and Hans-Joachim Hanisch collaborated on?

They have worked on 6 movies together! Their first movie together was Ein Kugelblitz aus Eberswalde (1972) while their highest rated movie together was Carnations in Aspic (1976). They have not worked together since Altes Herz geht auf die Reise (1987). They are most known for their comedy films together.