Hi,

I'm new to Cocoa and I'm totally stucked with
AudioFileOpen.  I searched the web and the mailing list for hints on
what I'm doing wrong, but I can't figure out the problem.  Below is
what I did.

a) Created a Cocoa Core Data Document Application.

b) Code for MyDocument.h

     #import <Cocoa/Cocoa.h>
     #import <AudioToolbox/AudioToolbox.h>

    @interface MyDocument : NSPersistentDocument {
         FSRef                          mFileRef; 
         AudioFileID                mExportFileID; 
     }

    @end

c)Code for MyDocument.m

     #import "MyDocument.h"

    @implementation MyDocument

    - (id)init 
    {
       self = [super init];
       mExportFileID = 0;
    
       NSString *fileLocation =@"/Users/julioferrer/Desktop/Audio.aiff";
       fileLocation = [fileLocation stringByStandardizingPath];
    
      FSPathMakeRef((const UInt8*)[fileLocation fileSystemRepresentation], 
&mFileRef, false);
      AudioFileOpen(&mFileRef, fsRdPerm, 0, &mExportFileID);
        
     }

When I build the project I get one error on the AudioFileOpen line.  This is 
log:    "_AudioFileOpen", referenced from:
I'm also using the GCC_ENABLE_OBJC_GC = supported


Thanks for any help.
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