<html><head></head><body><div class="ydp52203959yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div>Dear Wien2k Users,</div><div><br></div><div>The most fundamental procedure for finding elastic constants using IRelast-package, is to use the theoretically optimized lattice Volume. This means your system is at ZERO-Pressure.</div><div><br></div><div>With best,</div><div>Morteza Jamal</div></div></body></html>