Thread: Why am I getting this error?

Ok so here's my problem now....

Code:

#include "App.h"

#include "Movie.h"
#include "Actor.h"
#include "ActorDB.h"
#include "MovieDB.h"


#include <string>
#include <fstream>
#include <iostream>

using namespace std;

App::App()
{
}

App::~App()
{
}

void App::read_file(const std::string& fname)
{
	ifstream infile(fname.c_str());
	if (!infile)
		return;
	
	string actor_name;
	while (getline(infile, actor_name, '\t')) {
		//cout << "Actor: " << actor_name << endl;
		
		Actor current_actor(actor_name);
		ActorDB::tag current_ref = adb.add_actor(current_actor);	
		input_roles(current_ref, infile);
	}
}
	
void App::get_path() const
{
	while (true) {
		Movie m;
		cout << "Enter an actor's or actresse's name (q to quit): ";
		string name;
		getline(cin, name);
		
		if (name == "q")
			break;
			
		cout << "\nEnter another actor or actress's name (q to quit): ";
		string name2;
		getline(cin, name2);
		
		if (name2 == "q")
			break;
		
		m.printPath(name, name2);
		
		
		
	}
}
	
void App::kevin_bacon() const
{
	
}

void trim(string& s) 
{
	int pos = 0;
	while (s[pos] == '\t' || s[pos] == ' ')
		++pos;
	int pos2 = s.size()-1;
	while (s[pos2] == '\t' || s[pos2] == ' ')
		--pos2;
	s = s.substr(pos, pos2-pos+1);
}

string find_year(string& mtxt) 
{
	int pos1 = mtxt.size();
	do {
		pos1 = mtxt.rfind('(', pos1-1);
	} while (mtxt[pos1+1] != '1' && mtxt[pos1+1] != '2' && mtxt[pos1+1] != '?');

	int pos2 = mtxt.find(')', pos1+1);
	string year = mtxt.substr(pos1+1, pos2-pos1-1);
	mtxt = mtxt.substr(0, pos1);
	trim(mtxt);
	return year;		
}

void App::input_roles(ActorDB::tag a, std::istream& in) {
	while (true) {
		string movie_txt;
		if (!getline(in, movie_txt))
			break;
		if (movie_txt == "")
			break;
			
		trim(movie_txt);
		if (movie_txt[0] == '"')
			continue;
		
		// we have a real movie.  Find the year.
		
		//cout << "   Movie txt: " << movie_txt << endl;
		
		string year = find_year(movie_txt);
		//cout << "       Movie name: " << movie_txt << endl
		//	 << "       Movie year: " << year << endl;
		
		Movie m(movie_txt, year, &adb);
		MovieDB::tag t = mdb.add_movie(m);
		const Movie& movie = mdb.get_movie(t);
		
		movie.add_actor(a);
		movie.actorConnections(a);
		
		
	}
}

I don't believe my vertices are being created. I think my problem lies where I call the printPath function with object m, but I'm calling actorConnections at the bottom to create the vertices with a different object (movie). Or does this not matter? Or is it some other problem?