
          </p></dd>
<dt><span class="term">user_error</span></dt>
<dd><p>
            Calls a <a class="link" href="pol_tutorial/user_def_err_pol.html" title="Calling User Defined Error Handlers">user-supplied
            error handler</a>.
          </p></dd>
</dl>
</div>
<p>
      The following tables show all the permutations of errors and actions, with
      the <span class="bold"><strong>default action for each error shown in bold</strong></span>:
    </p>
<div class="table">
<a name="math_toolkit.err