@BigBadJohnnyB this line of code in MMM-Facial-Recognition-Tools/lib/config.py line 15 (CV_MAJOR_VER, CV_MINOR_VER, mv1, mv2) = cv2.__version__.split(".") that says parse the cv2 version string with a dot, and put the parts in the 4 variables… BUT the cv2 version doesn’t have 4 parts after split… only 3… so the python assignment code doesn’t know what to do… it can’t fill in the 4th part (mv2) AND only CV_MAJOR_VER is used in the code following, so one could change the broken line to result = cv2.__version__.split('.') CV_MAJOR_VER = result[0]