<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"><style>body { line-height: 1.5; }body { font-size: 14px; font-family: "Microsoft YaHei UI"; color: rgb(0, 0, 0); line-height: 1.5; }</style></head><body>Dear Developers,<div><br></div><div>Recently, I did a test about the geometry relaxtion of graphene by different QE version (i.e., 6.7, 7.1 and 7.2 version). Only the 6.7 version gives the convergened result, while not for the 7.1 and 7.2. Please see the attachment. </div><div><br></div><div>Is there a bug or other things in the QE 7 version? </div><div><br></div><div>Thanks </div><div><br></div><div>Roc </div><div><br></div><div>Henan Normal University, China</div></body></html>