NSOpenPanel runModal Crashes?

Question

I'm have a routine based on code found on this forum:

+ (FSRef)useOpenFileToGetFSRef:(NSString **)fileName requiredFileType: (NSString*) requiredFileType
{
     FSRef fileFSRef;
    NSArray* fileTypes = [[NSArray alloc] initWithObjects:requiredFileType, nil];

    //http://stackoverflow.com/questions/11815784/objective-c-nsopenpanel-get-filename
    NSOpenPanel* openDlg = [NSOpenPanel openPanel];
    [openDlg setFloatingPanel:YES];
    [openDlg setCanChooseDirectories:NO];
    [openDlg setCanChooseFiles:YES];
    [openDlg setAllowsMultipleSelection:YES];
    [openDlg setAllowedFileTypes:fileTypes];

    if ( [openDlg runModal] == NSOKButton )  //<== CRASHES ON CALL TO runModal
    {
        NSArray* filePaths = [openDlg URLs];
        //only getting 1st file
        NSURL *fileUrl = [filePaths objectAtIndex:0];

        *fileName = [fileUrl path];
        CFURLGetFSRef((CFURLRef)fileUrl, &fileFSRef);
    }

    return fileFSRef;
}

The app repeatably crases on the call to runModel:

What could explain this?

Thanks very much in advance to all for any info.

System info: OS X 10.8.4. Compiled using ARC.

Answer 1

I actually think you had a breakpoint on all exceptions. I just ran into this and was looking for why. I ran into this post, but then found the following.

NSOpenPanel crashes when debugging with Xcode 4.5.1

When you recreated the project, the breakpoints got reset.