To delete a non-publication attachment, use the mysql interface: <a href="http://embedded.eecs.berkeley.edu/mysql"><code>http://embedded.eecs.berkeley.edu/mysql</code></a>.
<p>Then browse to the database that corresponds with the
workgroup, for example <code>execboard_4</code> and
then find the table that corresponds with the forum, for
example <code>private</code>.
<p> The entries are at the end of the table, use the
"&gt;&gt;" button to go to the end of the table.

<p>See also
<a href="http://embedded.eecs.berkeley.edu/dopsysadmin/faq/105.html">Deleting a publication, publication attachment or publication upload</a>