(null): While reading /Users/lewiselliott/Desktop/Final Version/2bm/2bm/static.png pngcrush caught libpng error:
(null): Could not find file: /Users/lewiselliott/Desktop/Final Version/2bm/build/Debug-iphoneos/2bm.app/static.png
Command /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/PrivatePlugIns/iPhoneOS Build System Support.xcplugin/Contents/Resources/copypng emitted errors but did not return a nonzero exit code to indicate failure
What does this mean and why has it only just started happening, how do I fix it?
I'm guessing that this happened when testing the application on a device. It is because of your image static.png. It isn't a png file. Remove that file and try again. Also, I'm guessing that the application doesn't crush and the above mentioned image is not showing anywhere where it should. Try opening the file in photoshop and save it as a png.