Erro: Aviso do Apple Mach-O Linker (Id)

Question

Oct 13, 2011, 11:33 AM

Erro: Aviso do Apple Mach-O Linker (Id)

No meu aplicativo, tenho trabalhado para importar e exportar o banco de dado

Importei alguns arquivos necessários para esta funcionalidade, mas quando tento executar o aplicativo no simulador, os erros listados abaixo ocorrem. Não consigo entender que tipo de erros são esses. então por favor me ajude a resolver esse problem

Undefined symbols for architecture i386:
  "_inflateInit2_", referenced from:
      ,-[NSData(NSDataExtension) gzipInflate] in NSData+CocoaDevUsersAdditions.o
  "_inflate", referenced from:
      -[NSData(NSDataExtension) gzipInflate] in NSData+CocoaDevUsersAdditions.o
  "_inflateEnd", referenced from:
      -[NSData(NSDataExtension) gzipInflate] in NSData+CocoaDevUsersAdditions.o
  "_deflateInit2_", referenced from:
      -[NSData(NSDataExtension) gzipDeflate] in NSData+CocoaDevUsersAdditions.o
  "_deflate", referenced from:
      -[NSData(NSDataExtension) gzipDeflate] in NSData+CocoaDevUsersAdditions.o
  "_deflateEnd", referenced from:
      -[NSData(NSDataExtension) gzipDeflate] in NSData+CocoaDevUsersAdditions.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status