can someone help me?

[Amerson H Lin]

I have this method, in doall.cpp

void RSASignFile(const char *privFilename, const char *messageFilename,
const char *signatureFilename)
{
  AutoSeededRandomPool randPool = AutoSeededRandomPool();
  unsigned int msgLength=512;
  SecByteBlock msg(msgLength);
  InvertibleRSAFunction privKey;
  
  FileSource privFile(privFilename, true, new HexDecoder);

  FileSource msgFile(messageFilename, true);
  msgFile.Get(msg, msgLength); 

  RSASSA_PKCS1v15_SHA_Signer priv(privFile);
  
  privKey = (InvertibleRSAFunction&)priv.GetPrivateKey();

  if (privKey.Validate(randPool, 3)){
    unsigned int sigLength = priv.SignatureLength();
    printf("private key is acceptable with length of %i \n", sigLength);
    SecByteBlock sig(sigLength);
  
    priv.SignMessage(randPool, msg, msgLength, sig);

    StringSource(sig, priv.SignatureLength(), true, new HexEncoder(new
FileSink(cout)));
   
  }
}

When i call it using crypto++ 5.1 under redhat 9.0, i get the following
error:
% Abort
and the program exits, the program aborts on the line:
priv.SignMessage(randPool, msg, msgLength, sig).

please help

amerson