p"><span class="cnu">null</span></code>). The <code class="fsharp"><a
      href="../reference/primitives.html#members.Error"><span class="ci">Error</span></a></code> field holds a list of error messages in the form of
      an <code class="fsharp"><a href="../reference/errormessagelist.html"><span class="ci">ErrorMessageList</span></a></code> value. An empty <code
      class="fsharp"><a href="../reference/errormessagelist.html"><span class="ci">ErrorMessageList</span></a></code> is represented as a <code
