Requires <tt>finalcnfile = </tt><i>file</i> to be set before calling
this command.  Write atomic positions of the current configuration to <i>file</i>.

<p>
If <tt> write_all = 1</tt> is also set,
the atomic velocities and other information are written in <i>file</i> as well.

<p>
See <a href="http://micro.stanford.edu/wiki/Output_File_Formats_in_MD++#Configuration_.cn_File">wiki page</a> for more details.

<p>
Also see <tt>zipfiles</tt>.
