CoreData を試して最初につまずいたのがこれ。1個エンティティを追加しただけなのに、いきなりエラーかよ(怒)! 2010-07-10 13:42:23.939 Locations[1817:207] Unresolved error Error Domain=NSCocoaErrorDomain Code=134100 "The operation couldn’t be completed. (Cocoa error 134100.)" UserInfo=0xb32a1b0 {metadata={type = immutable dict, count = 6, entries => … 中略 , reason=The model used to open the store is incompatible with the one used to create the store