Q:

NSInvocation error in class which doesn't exist anymore

I had a class named "Object", changed the name to TheObject (everywhere in my project) cause I thought it would cause problems. (TheObject is a CoreData generated class)
Now i get this error:
2012-09-21 14:19:45.794 Choose3[1348:fb03] *** NSInvocation: warning: object 0x191f500 of class 'Object' does not implement methodSignatureForSelector: -- trouble ahead
2012-09-21 14:19:45.794 Choose3[1348:fb03] *** NSInvocation: warning: object 0x191f500 of class 'Object' does not implement doesNotRecognizeSelector: -- abort

Why does Xcode still think I have a class named Object while I haven't ?

A:

The name of the entity in the model was changed but the class of the entity was still Object, and not TheObject.

