Failed to load window nib file

Question

I am currently building an Application, and I want to use sereval windows. But if I want to open the second window, I ways get this command line message:
2011-05-18 20:41:14.069 iLearnVocab[11773:903] -[AddVocabulary loadWindow]: failed to load window nib file 'Add Vocabulary'.
The compiler sais No Issues. In the Application, there is a button, in the main window, that opens the second Window. At first, I tried, to create an empty XIB and add an NSPanel. After that I tried to use a XIB with a window, but it doesn't really matter. The problem is the same. I tried several things, that might cause this problem. File`s owner is set to an Window Controller, that was made for this window and the name of the window in the code seems to be correct. A Controller, that is responsible for sereval other things (such as  table view or all the other buttons) has this method if the button, which should open the Window is pushed:
- (IBAction)addVocabulary:(id)sender {
    if (!addVocabularyController) {
        addVocabularyController = [[AddVocabularyController alloc] init];
    NSLog(@"addVocabularyController: %@", addVocabularyController);
    [addVocabularyController showWindow:self];
I also added an outlet of the window (or panel) to the controller. While hunting this bug, I was looking in Aaron Hillegass "Cocoa programming for Mac OS X" for help. I followed every step how to add an additional window, but it didn't worked in my project. Hillegass example project worked, when I was building it. I did everything like it was done in the example project, but it somehow doesn`t work.
It would be really great if you could help me, thanks, Elefantosque

Answer 1

Elefantosque wrote:
I am currently building an Application, and I want to use sereval windows. But if I want to open the second window, I ways get this command line message:
2011-05-18 20:41:14.069 iLearnVocab[11773:903] -[AddVocabulary loadWindow]: failed to load window nib file 'Add Vocabulary'.
- (IBAction)addVocabulary:(id)sender {
    if (!addVocabularyController) {
        addVocabularyController = [[AddVocabularyController alloc] init];
    NSLog(@"addVocabularyController: %@", addVocabularyController);
    [addVocabularyController showWindow:self];
The error says 'Add Vocabulary' (with a space) - you seem to be using (?) an XIB named 'AddVocabulary' ...?
What is the name of your XIB, exactly?