Core Data; Cocoa error 134100

Question

This is my first time with core data, and I am getting the following error.

I would really appreciate it if you could tell me how to fix it.

Unresolved error Error Domain=NSCocoaErrorDomain Code=134100 "The operation couldn’t be completed. (Cocoa error 134100.)" UserInfo=0x5927880 {metadata=<CFBasicHash 0x59269a0 [0x1007400]>{type = immutable dict, count = 7, entries =>     2 : <CFString 0x5926e10 [0x1007400]>{contents = "NSStoreModelVersionIdentifiers"} = <CFArray 0x5927240 [0x1007400]>{type = immutable, count = 0, values = ()}     4 : <CFString 0x5927190 [0x1007400]>{contents = "NSPersistenceFrameworkVersion"} = <CFNumber 0x5926ca0 [0x1007400]>{value = +320, type = kCFNumberSInt64Type}     6 : <CFString 0x59271c0 [0x1007400]>{contents = "NSStoreModelVersionHashes"} = <CFBasicHash 0x5927340 [0x1007400]>{type = immutable dict, count = 2, entries =>     0 : <CFString 0x5927280 [0x1007400]>{contents = "Details"} = <CFData 0x59272f0 [0x1007400]>{length = 32, capacity = 32, bytes = 0x434e180241ecf461e59580e640ff926b ... aa456d1410ed9d1b}     2 : <CFString 0x5927260 [0x1007400]>{contents = "History"} = <CFData 0x59272a0 [0x1007400]>{length = 32, capacity = 32, bytes = 0x3437f77a5563363f66b9d72ea76e0ff1 ... be194eb9dd17cddc} }      7 : <CFString 0xe238b0 [0x1007400]>{contents = "NSStoreUUID"} = <CFString 0x5926fc0 [0x1007400]>{contents = "6C5FECCB-0B64-46EB-809B-E0A4577D1E90"}     8 : <CFString 0xe23720 [0x1007400]>{contents = "NSStoreType"} = <CFString 0xe238f0 [0x1007400]>{contents = "SQLite"}     9 : <CFString 0x59271f0 [0x1007400]>{contents = "NSStoreModelVersionHashesVersion"} = <CFNumber 0x4d13e20 [0x1007400]>{value = +3, type = kCFNumberSInt32Type}     10 : <CFString 0x5927220 [0x1007400]>{contents = "_NSAutoVacuumLevel"} = <CFString 0x5927380 [0x1007400]>{contents = "2"} } , reason=The model used to open the store is incompatible with the one used to create the store}, {     metadata =     {         NSPersistenceFrameworkVersion = 320;         NSStoreModelVersionHashes =         {             Details = <434e1802 41ecf461 e59580e6 40ff926b 20004ce9 58eb965f aa456d14 10ed9d1b>;             History = <3437f77a 5563363f 66b9d72e a76e0ff1 ed7f70fd cb7035e9 be194eb9 dd17cddc>;         };         NSStoreModelVersionHashesVersion = 3;         NSStoreModelVersionIdentifiers =         (         );         NSStoreType = SQLite;         NSStoreUUID = "6C5FECCB-0B64-46EB-809B-E0A4577D1E90";         "_NSAutoVacuumLevel" = 2;     };     reason = "The model used to open the store is incompatible with the one used to create the store"; } sharedlibrary apply-load-rules all Current language:  auto; currently objective-c kill quit Program ended with exit code: 0 

My code is here: https://gist.github.com/898579

Answer 1

Here's the reason:

The model used to open the store is incompatible with the one used to create the store

And here's how you did it:

1. You created some entities with some attributes and wrote some code
2. Launched the app, probably added some content
3. Quit the app and added/changed some more entities with attributes
4. You probably launched the app again and now it's giving you the error

The reason for this is because your new managed object model is trying to use older version of storage (the one first time created when you launched the app).

The quick and dirty fix would be to remove the storage file (somewhere in ~/Library/Application Support/YOUR_APP/) and to launch your app again.

For future reference - if you release an app and in next release the app has changed managed object model - you have to write migrations for it. All this and more is covered in core data programming cookbook in apple documentation.