Nested <vb:each> template calls

[stevegrant]

I have a multi-dimensional array of data which I am passing into my template, and I want to go through each "level 1" of the array and process that "level"'s child arrays.

Here's the code extract:

<vb:each from="appearance_stats" key="season_id" value="season">
  <div>
    <table cellspacing="0">
    <tr>
      <th>Competition</th>
      <th>Appearances</th>
      <th>Goals</th>
      <th>Yellow</th>
      <th>Red</th>
    </tr>
    <vb:each from="season.season_data" key="competition_id" value="competition">
    <tr>
      <td>{vb:raw competition.competition}</td>
      <td>{vb:raw competition.starts} ({vb:raw competition.subs})</td>
      <td>{vb:raw competition.goals}</td>
      <td>{vb:raw competition.yellows}</td>
      <td>{vb:raw competition.reds}</td>
    </tr>
    </vb:each>
    </table>
  </div>
  </vb:each>

The code scans ok at first glance, but I'm getting an "Warning: Invalid argument supplied for foreach() in [path]/includes/class_core.php(4029) : eval()'d code on line 122" error message when I load the page... any ideas?