Hey, thanks for your help! I started trying your solutions, then a friend came up with a solution:

In the event, you need to 'Insert new condition' -> 'System' -> 'Trigger once while true'.

Apparently, at least in my case, the event is checked every tick and the program cannot cope with that (it's an assumption, I won't claim to understand the underlying happenings of construct ).

Thing is, that solution did not work with my example .cap file that I provided, but it did work with my main program... having looked at your topic where you provided the link, R0J0hound provided a (more elegant?) solution to your problem, so hopefully your problem will also be solved!

Regards,

JFK

Hi!

I am having problems with the physics behaviour of sprites, more specifically, with the mass attribute. I would like to change the mass attribute via a checkbox in-game, but whenever I tick the checkbox, the sprite freezes on the spot.

Can someone please enlighten me as to what my error is? I have attached a .cap file to demonstrate the problem.

Regards,

JFK