 any object.</p></dd>


<dt>name</dt>
<dd><p>A single character which gives the argument's name.
The name is used in the error message. By default, the name of the
argument passed to argument <code>x</code> is captured automatically.</p></dd>


<dt>general</dt>
<dd><p>Optional. A single character which is used to give a
general statement of the error incurred. By default, this is generated
automatically.</p></dd>


<dt>specific</dt>
<dd><p>Optional. A single character which gives a detailed
description of t