I've got a problem when testing on my iPhone for my new app update. All my header images to my new app have the " CopyPNGFile Error " when uploading the app to my phone. Although the build succeeds, the header images all have question marks all over them. This does not happen in the simulator, and the simulator is exactly how I want it. What on earth is going on here? I want to test it properly before sending off to Apple, because if they get the same errors, they will definitely reject it. I get 91 of these errors, all of them look very similar to this: While reading /Users/Thomas/Developer/Apps/Berlitz Edinburgh/berlitzedinburgh_v20_iOS/BT_Images/[email protected] pngcrush caught libpng error: Not a PNG filCould not find file: /Users/Thomas/Library/Developer/Xcode/DerivedData/berlitzedinburgh-dtejrxqeqiapyfbjapuyfkasunjk/Build/Products/Debug-iphoneos/berlitzedinburgh.app/[email protected] /Applications/Developer/Xcode/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/copypng emitted errors but did not return a nonzero exit code to indicate failure

I have this happen periodically, my solution, copy the images away, delete them from xcode, then copy them back. Fixes it every time. Don't know why it happens though. It's like it didn't get a clean copy.

You might try deleting the app from the device before reloading; perhaps some things aren't being written over properly. Should a space between 'berlitz' and 'edinburgh' be a problem? I wouldn't think so, but... Cheers! -- Smug

I had this and it was down to images that were previously jpeg's but that id changed to png's. After messing with thema few times, i just renamed thema s jpegs and changed the links to them to match, and all was ok. (BT_Quiz image questions in my case)

You can also look through the files and look for one where it's name is in red. This error usually occurs when a image link has been broken. -tM

I'm afraid I'm still getting the same errors, despite whatever I do to it. Even when archiving the app, it comes with these errors, but the simulator works fine. Some images are transferred to my iPhone and iPad, and but most aren't.