I created the CarLot project as per your instructions in Chapter 11 and got the following error on startup (sometime after MyDocument’s init: invocation):
2012-09-19 12:51:54.961 CarLot[560:303] Cannot create NSArray from object <MyDocument: 0x10061ae00> of class MyDocument
2012-09-19 12:51:54.978 CarLot[560:303] Cannot create NSArray from object <MyDocument: 0x100141770> of class MyDocument
Fearing a typo or other error on my part, I built and ran the Solution project for CarLot that I downloaded from your website. I got the same error. I’m running XCode 4.4.1 on Mountain Lion. Let me know if I can provide any further information. Thanks.