I was wondering if anybody could help me out with this problem, I am trying to run my Java code to an iRobot using a Blue tooth adapter, the computer sees the BAM device and everything but everytime I connect it to the outgoing port I always get this error;

java.lang.NullPointerException
   at roombacomm.RoombaCommSerial.send(RoombaCommSerial.java:199)

Below is the code that I am trying to run;

import roombacomm.*;
import roombacomm.net.*;
import mkv.MyGUI.*;                                                                      

// if you set roombaCommPort to null, it will bring up the port picker dialog
// if you set it to "testdummy", it will be a bring up a non-functioning test of the GUI                                                                      
//String roombacommPort = "testdummy";                                          
//String roombacommPort = "/dev/cu.KeySerial1";
//String roombacommPort = "/dev/cu.BlueRadios-COM0-1";
String roombacommPort = null ; // This is the line that you will need to worry about
boolean done = true;
RoombaCommSerial roombacomm;

void setup()
{
 roombacommSetup();  
}

void draw()
{
  if (roombacomm == null )
  return;
}

void roombacommMove()
{
 int speed = 300;
 int time = 5000;

 roombacomm.goForwardAt(speed);
 roombacomm.pause(time);
 println("travelling at "+speed+" millimeters per second for  "+time+" milliseconds.");  
 roombacomm.stop();
}
 
void roombacommPortSelected()
{
 roombacomm = new RoombaCommSerial();
 if( roombacommPort.equals("testdummy"))
  {
    return;  //Test the user interface without the Roomba
  }
 
 println("opening roomba serial port ' " +roombacommPort+ "'" );


 if(! roombacomm.connect(roombacommPort))
   {
     println("Couldn't connect to the registered port" +roombacommPort );
   }    

//This block of code was taken from Dr. Kandasamy's challenge 1a code
 println("Roomba connected to port" +roombacommPort);
 roombacomm.startup();
 roombacomm.control();  //Puts in a state of Safe Mode
 roombacomm.pause(50); //Pause for 50 milliseconds  
 roombacomm.playNote(72, 8); //Plays note to signify proper connectivity
 roombacomm.pause(200); // Pauses while the notes are being played
 roombacomm.playNote(72, 10);
 roombacomm.updateSensors();   // Command that updates Sensors
 
 roombacommMove();          //Start the program  
}

void roombacommSetup()
{
 if( roombacommPort != null ) {
   roombacommPortSelected();
   return;
 }

 RoombaComm rc = new RoombaCommSerial();     // throwaway just to find ports
 final String portlist[] = rc.listPorts();   // FIXME: should be made static
 javax.swing.SwingUtilities.invokeLater(new Runnable() {
   public void run() {
     try {
       String port = (String) javax.swing.JOptionPane.showInputDialog( null,
                             "Select Roomba Port",
                             "RoombaTune",
                             javax.swing.JOptionPane.QUESTION_MESSAGE,
                             null, portlist, null);
       if( port == null )  {
         javax.swing.JOptionPane.showMessageDialog(null, "No port chosen, goodbye");
         System.exit(1);
       }
       roombacommPort = port;
       roombacommPortSelected();
     }
     catch (Exception e) {
       e.printStackTrace();
     }
   }
 });
}

any kind of feedback would be great.
Thanks Ryan