ok found the problem.
I have deleted several sprites from the scene in 2d mode.
one of them was an image I haven't used yet.
in another agc file, i wrote some lines that when the game is looping the gameMode it creates some new sprites, but because I deleted the sprites from the scene editor the new sprite could not find the right index of that image "SceneName_Images"
once deleted from the scene editor the array is self-reorganizing.
Maybe AGKstudio needs to know that when I'm pointing at an element inside an array inside a *scene file, once an array is changed it will auto change in all other agc files in the project.
now the thing is that only after I restarted the computer twice when I clicked to run it showed me a dialog that something is wrong before it just hangs the exe with a white screen... I thought that what I suggested here was already implemented, is it possible to add this feature?