Terminate called after throwing an instance of 'int' Aborted -Ошибка, как быть?

if(strcmp(argv[1], "-e") == 0){
 
        string keyFileName=argv[2];
        string plainTextFileName=argv[3];
       
        //openning key file to read
        ifstream keyFile(keyFileName.c_str());
        ofstream  cipherFile;
        
        //ofstream myFile;
        stringstream buffer;
 
        buffer << keyFile.rdbuf();
        string keyValue = buffer.str();
 
        cout<<"Key value: "<<keyValue<<endl<<endl;
 
        BLOWFISH bf(keyValue);
 
        //openning key file to read
        ifstream plainTextFile(plainTextFileName.c_str());
        stringstream buffer2;
 
        buffer2 << plainTextFile.rdbuf();
        string plainText = buffer2.str();      
 
 
        cout <<"Original text from the file: \n----------------------------\n";
        cout<<plainText;
 
        bf.Encrypt_CBC(plainText);
        cout << "\nEncrypted: \n-----------------------\n" << bf.Encrypt_CBC(plainText)<< endl;
 
          //Writing encrypted blowfish cbc cipher into the file
        cipherFile.open(argv[4]);
    
        cipherFile <<bf.Encrypt_CBC(plainText);
        cipherFile.close();
 
    }