TCA (flexform) multi select
<p>I work on an extension and for a plugin I want to select specific records. For that I created a flexform with a TCA select configuration:</p>

<pre><code>&lt;T3DataStructure&gt;
  &lt;meta&gt;
    &lt;langDisable&gt;1&lt;/langDisable&gt; 

  &lt;/meta&gt;
  &lt;sheets&gt;
    &lt;sDEF&gt;
      &lt;ROOT&gt;
        &lt;TCEforms&gt;
          &lt;sheetTitle&gt;TEST&lt;/sheetTitle&gt;
        &lt;/TCEforms&gt;
        &lt;type&gt;array&lt;/type&gt;
        &lt;el&gt;


          &lt;settings.selection&gt;
            &lt;TCEforms&gt;
              &lt;exclude&gt;1&lt;/exclude&gt;
              &lt;label&gt;Selection&lt;/label&gt;
              &lt;config&gt;
                &lt;type&gt;select&lt;/type&gt;      
                &lt;foreign_table&gt;tx_mycollection_domain_model_mycollection&lt;/foreign_table&gt;
                &lt;renderType&gt;selectCheckBox&lt;/renderType&gt;
                &lt;size&gt;5&lt;/size&gt;
                &lt;minItems&gt;3&lt;/minItems&gt;
                &lt;maxItems&gt;999&lt;/maxItems&gt;
                &lt;foreign_table_where&gt;AND tx_mycollection_domain_model_mycollection.sys_language_uid=###REC_FIELD_sys_language_uid###&lt;/foreign_table_where&gt;
              &lt;/config&gt;
            &lt;/TCEforms&gt;
          &lt;/settings.selection&gt;

        &lt;/el&gt;
      &lt;/ROOT&gt;
    &lt;/sDEF&gt;
  &lt;/sheets&gt;
&lt;/T3DataStructure&gt;
</code></pre>

<p>It looks fine, in the backend I have checkboxes to select the records. But when I save the plugin only the first checkbox is checked/saved.</p>

<p>Is there something wrong in the configuration or what could be the reason that I can not save multible values?</p>