How many movies have Hermann Warm and Rudolf Meinert collaborated on?

They have worked on 5 movies together! Their first movie together was The Hound of the Baskervilles (1914) while their highest rated movie together was The Cabinet of Dr. Caligari (1920). They have not worked together since Die Jagd nach dem Tode - 4. Teil: Die Goldmine von Sar-Khin (1921).