title: failed to create task or type copyfiles
body: <p>i am getting following error in build.xml</p>
  
  <p>C:\navigator\nbproject\build-impl.xml:1011: Problem: failed to create task or type copyfiles
  Cause: The name is undefined.</p>
  
  <p>build.xml</p>
  
  <p>
          
          
          
          
          
          
          
          
          
          
          </p>
  
  <p>can anyone suggest me, how to resolve it??</p>
  
  <p>thanks in advance</p>