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POCocoa-Touch, Core Data: Linker error, NSManagedObject symbol not found
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copied!<p>I have a cocoa-touch app, using the core data framework.</p> <p>I've created a xcdatamodel with two entities: <code>Program</code> and <code>ProgramReplay</code>.<br> <code>ProgramReplay</code> has a relationship to <code>Program</code>, and a reverse relationship exists in the later.</p> <p>I've saved this, and used XCode's feature to generate the classes for these two entities. The generated headers are as follows:</p> <pre><code>#import <CoreData/CoreData.h> @class ProgramReplay; @interface Program : NSManagedObject { } // other properties here, removed them to keep it short @property (nonatomic, retain) NSSet* replays; @end @interface Program (CoreDataGeneratedAccessors) - (void)addReplaysObject:(ProgramReplay *)value; - (void)removeReplaysObject:(ProgramReplay *)value; - (void)addReplays:(NSSet *)value; - (void)removeReplays:(NSSet *)value; @end </code></pre> <p>and</p> <pre><code>#import <CoreData/CoreData.h> @class Program; @interface ProgramReplay : NSManagedObject { } @property (nonatomic, retain) NSDate * date; @property (nonatomic, retain) Program * program; @end </code></pre> <p>I haven't started using these two classes anywhere yet, but when I try to build them I get the following weird linking errors:<br> <code>".objc_class_name_NSManagedObject", referenced from:<br> .objc_class_name_Program in Program.o<br> .objc_class_name_ProgramReplay in ProgramReplay.o<br> ld: symbol(s) not found<br> collect2: ld returned 1 exit status</code></p> <p>What am I doing wrong?</p>

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