Java.lang.ArrayIndexOutOfBoundsException:0>=0

Bonjour,
je reçois cette erreur :java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
lorseque j'execute mon script:

public void doQRPatient() { 
     System.out.println("methode patien dcm"); 
        String cmd = ""; 
        MyParser parser = new MyParser(); 
        Vector total1 = new Vector(); 
        Vector total2 = new Vector(); 
        Vector total3 = new Vector(); 
        try { 
            cmd = userDir + BIN_DCMQR + java.util.ResourceBundle.getBundle("pacs/resources/Strings").getString("_-R_00080090_-R_00100010_-R_00100020_-R_00081030_") + " " + aeTitle + "@" + address + ":" + port; 
            System.out.println("COMANDO 1:" + cmd); 
            total1 = executer(cmd); 
            for (int i = 0; i < total1.size(); i++) { 
                System.out.println(i+".-\t"+(String)total1.elementAt(i)); 
            } 
            System.out.println("app comb vec-ref"); 
            combineVectors1_referring_2(1, parser.parsePatient(total1.toArray()), parser.parseStudyUID(total1.toArray()), parser.parseNumberSeries(total1.toArray()), parser.parseNumberImages(total1.toArray()), parser.parseReferring(total1.toArray()), parser.parseStudyDesc(total1.toArray())); 
            parent.showMessage(java.util.ResourceBundle.getBundle("pacs/resources/Strings").getString("INICIADA_COMUNICACION_DICOM_CON_EL_NODO:_") + " "+aeTitle + "@" + address + ":" + port); 
        
       
        } catch (Exception err) { 
            err.printStackTrace(); 
            //parent.showMessage(java.util.ResourceBundle.getBundle("com/jjcp/resources/Strings").getString("HAOCURRIDOUNERROR")+aeTitle+"@"+address+":"+port); 
            parent.showMessage("ERROR :" + aeTitle + "@" + address + ":" + port); 
        } 
    }

la methode execute est :

private Vector executer(String cmd) { 
  Vector result = new Vector(); 
  try { 
                    System.out.println("method executer"); 
   Process p = Runtime.getRuntime().exec(cmd); 
   BufferedReader input = new BufferedReader(new InputStreamReader(p 
     .getInputStream())); 
   String line; 
   while ((line = input.readLine()) != null) 
    result.addElement(line); 
                        System.out.println("line"); 
   input.close(); 
  } catch (Exception ex) { 
   ex.printStackTrace(); 
  } 
  return result; 
 }

dans le out put j'ai:
methode patien dcm
COMANDO 1:C:\Documents and Settings\Administrateur\Mes documents\NetBeansProjects\pacs/bin/dcmqr.bat -r 00080090 -r 00100010 -r 00100020 -r 00081030 DCM4CHEE@127.0.0.1:11112
method executer
java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
line
app comb vec-ref
at java.util.Vector.elementAt(Vector.java:427)
at pacs.MyDCM.combineVectors1_referring_2(MyDCM.java:469)
at pacs.MyDCM.doQRPatient(MyDCM.java:101)
at pacs.PacsView.listarEstudios(PacsView.java:314)
at pacs.PacsView.access$800(PacsView.java:39)
at pacs.PacsView$4.run(PacsView.java:298)
31 mars 2011 20:20:44 pacs.PacsView$4 run
GRAVE: null
java.lang.NullPointerException
at pacs.PacsView.listarEstudios(PacsView.java:316)
at pacs.PacsView.access$800(PacsView.java:39)
at pacs.PacsView$4.run(PacsView.java:298)

alors si quelqu'un a une idée de cette erreur ,sa sera une grande générosité de lui de me l'indiquer.
merci d'avacne