- NSDocumentController *controller = [NSDocumentController sharedDocumentController];
- CheatDocument *doc = [controller makeUntitledDocumentOfType:@"Cheat Document"];
+ NSError *error = nil;
+ NSDocumentController *controller = [NSDocumentController sharedDocumentController];
+ CheatDocument *doc = [controller makeUntitledDocumentOfType:@"Cheat Document" error:&error];