Erro impressão Ireport

Boa tarde, pessoal!

Venho mais uma vez recorrer ao conhecimento geral do grupo. Tenho um relatório criado no ireport, quando faço a chamada para a visualização do mesmo ele gera um exceção :

Exception in thread "main" java.lang.NullPointerException
        at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:141)
        at chamaireport.Relatorio.geraRelatorio(Relatorio.java:40)
        at chamaireport.Relatorio.main(Relatorio.java:32)
Java Result: 1

segue o código que estou usando:

package chamaireport;

import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import net.sf.jasperreports.view.JasperViewer;
import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.util.JRLoader;

/**
 *
 * @author Beto
 */
public class Relatorio {


    private Map parametros = new HashMap();
    URL arquivo = getClass().getResource("LeituraTermometria.jaspel");



    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws JRException {
        try{
          new Relatorio().geraRelatorio();
      }catch (JRException e){
          System.out.println("Erro "+e);
      }
    }

    private void geraRelatorio() throws JRException {
         parametros.put("ParamCodiCabe","16");
         JasperReport relatorio = (JasperReport) JRLoader.loadObject(arquivo);
         //relatorio = JasperCompileManager.compileReport(Arquivo);
         JasperPrint impressao = JasperFillManager.fillReport(relatorio, parametros);
         JasperViewer viewer = new JasperViewer(impressao, false);
         viewer.show();
    }
}

Mudei o código, mas surgiu outro erro:

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/codehaus/groovy/control/CompilationFailedException
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:247)
        at net.sf.jasperreports.engine.util.JRClassLoader.loadClassForRealName(JRClassLoader.java:157)
        at net.sf.jasperreports.engine.util.JRClassLoader.loadClassForName(JRClassLoader.java:115)
        at net.sf.jasperreports.engine.JasperCompileManager.getCompiler(JasperCompileManager.java:511)
        at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:215)
        at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:148)
        at chamaireport.JFTeste.VisualizarRelatorio(JFTeste.java:107)
        at chamaireport.JFTeste.jButton1ActionPerformed(JFTeste.java:80)
        at chamaireport.JFTeste.access$000(JFTeste.java:27)
        at chamaireport.JFTeste$1.actionPerformed(JFTeste.java:55)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.Component.processMouseEvent(Component.java:6263)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6028)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2475)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.ClassNotFoundException: org.codehaus.groovy.control.CompilationFailedException
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
        ... 36 more

segue o código:

import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import javax.swing.JOptionPane;
import net.sf.jasperreports.engine.*;//para objeto JasperReport
import net.sf.jasperreports.view.*;//para objeto JasperViewer

public class JFTeste extends javax.swing.JFrame {

    private Map parametros = new HashMap();
    private JasperReport relatorio;
    private static final String layout = "c:\SisTerm\src\Relatorios\LeituraTermometria.jrxml";
    //URL arquivo = getClass().getResource("c:\SisTerm\src\Relatorios\LeituraTermometria.jrxml");

    /** Creates new form JFTeste */
    public JFTeste() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setText("jButton1");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(22, 22, 22)
                .addComponent(jButton1)
                .addContainerGap(305, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(20, 20, 20)
                .addComponent(jButton1)
                .addContainerGap(257, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
         VisualizarRelatorio();
    }

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new JFTeste().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    // End of variables declaration

    private void exibeErro(String msg, Exception e, boolean fatal) {
        JOptionPane.showMessageDialog(null, msg + "\n" + e.getMessage(),"Erro Fatal", JOptionPane.ERROR_MESSAGE);
        if (fatal)
            System.exit(1);
    }

  public void VisualizarRelatorio(){
        try {
            parametros.put("ParamCodiCabe", "16");
            relatorio = JasperCompileManager.compileReport(layout);
            JasperPrint impressao = JasperFillManager.fillReport(relatorio, parametros);
            JasperViewer viewer = new JasperViewer(impressao, false);
            viewer.show();
        }catch (JRException ex) {
            exibeErro("Não foi possível visualizar o relatório.", ex, false);
        }catch (Exception e){
            exibeErro("Impossível iniciar a aplicação:", e, true);
        }
  }

}

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