What am I doing wrong? It's probably something simple, but I can't see it. Any ideas?

Old version of Template...? Mysterious template engine configuration option?

This works for me

$ cat tt2-iterate-arrayohash.tt
[%#
## tt2-iterate-arrayohash.tt
## 2016-12-20-00:32:23
##
##

-%]
[%
    SET ed = "eddy";
    SET ad = "addy";
    SET voters = [
        {
          'lastname' => 'SCHMO',
          'firstname' => 'JOE'
        },
        {
          'firstname' => 'SCHMO',
          'lastname' => 'JIM'
        }
      ];

    USE Dumper Indent = 1;
    GET Dumper.dump( [ voters , ed, ad ] );
-%]
[%- TAGS <% %> -%]

<p>ed: <% ed %><br/>
ad: <% ad %></p>

<table>
  <tr>
    <th>First</th>
    <th>Last</th>
  </tr>
  <% FOREACH voter IN voters %>
  <tr>
    <td><% voter.firstname %></td>
    <td><% voter.lastname %></td>
  </tr>
  <% END %>
</table>

$ tpage tt2-iterate-arrayohash.tt
$VAR1 = [
  [
    {
      'firstname' => 'JOE',
      'lastname' => 'SCHMO'
    },
    {
      'firstname' => 'SCHMO',
      'lastname' => 'JIM'
    }
  ],
  'eddy',
  'addy'
];

<p>ed: eddy<br/>
ad: addy</p>

<table>
  <tr>
    <th>First</th>
    <th>Last</th>
  </tr>

  <tr>
    <td>JOE</td>
    <td>SCHMO</td>
  </tr>

  <tr>
    <td>SCHMO</td>
    <td>JIM</td>
  </tr>

</table>
[download]