Overlapping Problem

I've got a bunch of bullets being fired. Each is using a custom movement (made with events). I loop through each one, then I loop through them again to move them one pixel at a time, but 20 pixels per frame. To detect a hit, during the second loop, I check for collisions on the zombies. The conditions look like:
- On loop "BulletSteps"
- Fixed value of "Bullet" equal to value("BulletBeingMoved")
- Bullet is overlapping a zombie

That event never fires. I tried deleting the overlapping one, and it fires, but with it, it never fires. (I also tried switching the two objects around, that didn't work).

What's going on?

I also had a problem like this. At the start of the frame try to create bullets on all zombies at the same time. So all zombies overlap a bullet and vice versa. It's strange but it worked for me.

Uhhh, why would I do that? I want the player to have to shoot them, not have it shoot them at the beginning of the frame.

Does changing the event to zombie overlaps bullet work?

I don't remember for sure, but i think events like collision or overlapping are only tested before the main loop, not inside. Maybe i'm wrong but i think that if you set an object over another one, the "overlapping" condition can only be met at the next loop. You should maybe test this.

Yea, I've tried switching them.

After the loop eh? Would it do the same thing if I use the looping feature in an extension?

I'm really starting to hate the built in looping in MMF2...

I've never had a problem with detecting collisions within fastloops... I'm not entirely sure what Corentin means.

I think the old "Post up an example" idea might be best.

I can't test it right now but here's a test :
Start of frame :
-Start loop "test" 1 time

On loop "test"
-Set Object1 at 0,0 from Object2

On loop "test"
+Object1 overlaps Object2
-play sample "beep"

I think it won't beep because the overlapping isn't tested during the condition but before he main loop (when they aren't overlapping).

Sorry, I know it's quite a bad explanation, my poor English is giving me troubles.

Yes, Corentin, I had this problem with MMF1.5
If I remember well, you can't create an object and check for collision in the same loop.

I'm not creating objects in the same loop. I'll try to get an example file made, though, with my luck, the example file will work just fine...