(keitai-l) IApplication::getParameter

hello people,

i have the following code.  however, i am getting an error.

public class OBJTest extends IApplication
{

  public void start()
  {
    String p1=this.getParameter("Param1");
    Dialog d=new Dialog(Dialog.DIALOG_INFO,"test");
    d.setText("Param1="+p1);
    d.show();
  }
}

ERROR: Native method 'com/nttdocomo/ui/IApplication::getParameter()' has
used temporary roots incorrectly.

does anyone here know why this error occurs?  what does the error mean?

any help will be greatly appreciated.  thanks!

alex