Transform Listener Problem

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Hi I'm new to ROS and am trying to transform a point from the /odom frame to the /map frame. Every time I run the package I get the following error:

Invalid argument passed to lookupTransform argument source_frame in tf2 frame_ids cannot be empty

My code is detailed below:

geometry_msgs::PointStamped point1;
   geometry_msgs::PointStamped point2;
   std::string frame1 = "/odom"; 
   std::string frame2 = "/map";

void getPoseCallback(const geometry_msgs::Pose msg)

{
   point1.point.x = msg.position.x;
   point1.point.y = msg.position.y;
   point1.point.z = 0;
   point1.header.frame_id = frame1.c_str();
}

int main(int argc, char** argv)
{  
  ros::init(argc, argv, "tf_listener");

  ros::NodeHandle node;

  ros::Publisher pose = node.advertise<geometry_msgs::PointStamped>("odom_abs", 10);
  ros::Subscriber getPose = node.subscribe("/odom", 1000, getPoseCallback);
  tf::TransformListener listener;

      ros::Rate rate(10.0);

  point2.header.frame_id = frame2.c_str();

  while (node.ok())
  {
    try
    {
        listener.waitForTransform("/map","/odom",ros::Time::now(), ros::Duration(3.0));
        listener.transformPoint("/map", point1,point2);


       }
        catch (tf::TransformException &ex)
        {
      ROS_ERROR("%s",ex.what());
      ros::Duration(1.0).sleep();
      continue;
    }

    pose.publish(point2);



        ros::spin();
        rate.sleep();
      }

  return 0;
};

Checking with the class reference for the transform_listener, I can't find any error in the arguments.