I have almost 20 images in PNG format added to my current project on Xcode (under the proper group, Resources). Unfortunately, library window's Media tab doesn't show some of them. And if I create an UIImageView and set one of these invisible images from code, nothing shows up. I also tried from IB with adding a UIImageView and set its source image.

Is this problem a image format related issue or is there a tiny detail I'm missing.

What log says:

```
Could not load the "07_clock_icon.png" image referenced from a nib in the bundle

```