Xcode- Deleted images appear in simulator

Question

Mac OS X Lion v10.7.2 Xcode v4.2.1 Build 4D502 gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00) GNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Th

Answer 1

After I did the "remove fromfolder"/"Reset content and setting"/remove app from simulator", I still had an old image hanging around in the simulator. Then I did a "Project>clean". Then the detailViewController.xib file disappeared from the folder. It is still present in XCode, but can not be found anymore when running the app in the simulator, cousing a crash. What is the problem here?