Cannot create an NSPersistentStoreCoordinator with a nil model

Question

Been having my first crack at Core Data and I\'m getting the following error when running my code on my device, but it works fine on the simulator..

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Answer 1

I know this doesn't solve your problem but I ran into this problem yesterday that plagued me for hours, the solution @Dominic Williams posted gave me a ArrayIndexOutOfBoundsException (whatever the Objective-C equivalent is).

I'm not very good with Objective-C/Xcode yet but I'm working on an iOS app that our company had (mostly) developed externally. Unfortunately, they would often forget how to use a keyboard and would use capital letters interchangeably or spell properties incorrectly but were too lazy to go back and change it. They had used a capital letter in the xcode project name where it was not supposed to be (our product name doesn't use a capital) and I had to go back and change every occurence of this upper-case letter to a lower-case; which included the project name, core data file, hundreds of variables, etc.

Anyways, once I had done this I ran into this error and no solution was fixing it for me. I had made sure that all URL names were correct, project cleaned, app uninstalled, phone restarted, etc with no avail. I gave up and turned off my Mac and went home for the day. To my surprise, I came back in this morning and everything seemed to work fine!

I have no idea why this worked but if your stuck, try restarting your Mac.