I uncheck it and then I could navigate back to the navigation menu slide.
So no luck with that.
Now I run some more test and always when I hit that button the points count is set to 0. Even if I already pressed that button once.
Thanks
You misunderstood me you have to ALLOW backwards navigation.
Never did hear about such a problem. I have been exploring quizzing system variables a lot. AFAIK the only way to reset cpQuizInfoPointsscore is to start a new attempt on Quiz level. Normally that is done by using the Retake button on the score slide. But it is also sufficient just to visit that slide after a failed attempt, or even jumping over that slide when it is hidden.
Do you have a score slide (hidden or not)? If not, please insert it (from Quiz Preferences) and see where it is in your filmstrip. Do you ever jump over that place with the branching actions?