jit.qt.movie not working when loading files automatically

Hej guys. I am creating kind of a slideshow in Jitter. I am loading different images into a jit.qt.movie by creating a name with a counter and a sprintf object, cycling through the images. I have encountered a really strange, and not quite well reproduceable issue: when I send bangs to the counter manually (by clicking on bang), I have no problem at all. but when I attach a metronome to the counter, I get the following error: "can't find file 1.jpg" - "jit.movie - error loading file"

When I created a small test patch, trying to reproduce the issue and saving it in the same folder, it actually worked. Somehow after creating that patch, the original worked as well. Then, after restarting Max, it stopped working again. I have no clue whats going on. If anyone has any idea, it would be greatly appreciated.

Or if anyone knows of any other way to do the same thing, that would be helpful as well. I googled for something like a buffer where I could store my images and then just cycle through them, but found nothing. If anyone can nudge me in the right direction, I would be very happy.

Oh, and somthing I almost forgot. I am using Max for Live, not the regular Max. I am not aware of any differences, but who knows. Also I am under Windows 10.