my $template;
  eval {
      $template = new HTML::Template(filename => 'foo.tmpl');
  };
  print $@ if $@;

  eval {
      $template->param(param1 => $somevalue);
      $template->param(param2 => $someothervalue);
  };
  print $@ if $@;

  eval {
      print $template->output();
  };