 cannot have keys both data and children. </p>
<p><span class="emphasis"><em>pt</em></span> cannot be deeper than two levels. </p>
<p>There cannot be duplicate keys on any given level of <span class="emphasis"><em>pt</em></span>. </p>
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<td><p><span class="term">Throws:</span></p></td>
<td>
<a class="link" href="ini_parser_error.html" title="Class ini_parser_error">ini_parser_error</a> In case of error translating the property tree to INI or writing to the output stream. </td>
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