Xcode: issue “file xxx.png is missing from working copy” at project building

Question

After deleting/adding some png files to project, i have got messages when building project.

\"file ProjectPath\\aaa\\xxx.png is missing from working copy.\"

Answer 1

Got this for every project after moving on to XCode 8. This solved it:

With Option Key pressed, Product (in title menu) -> Clean Build Folder.