<tt>HELMP</tt> equals <tt>HELM</tt> plus additional terms to make <tt>HELMP</tt>
a conserved quantity in various ensembles, including <tt>NVE</tt>, <tt>NVT</tt>, <tt>NPH</tt>,
<tt>NPT</tt>, &hellip;  It is useful to include <tt>HELMP</tt> in <tt>output_fmt</tt>
so that we can check whether this quantity is conserved in the property file.

<p>
Also see <tt>HELM</tt>, <tt>saveprop</tt>.
