<div class="iw_mail" dir="auto" style="font-size: 13px;"><div>Dear QE Users and Developers</div><div><br></div><div>Hi.</div><div>I would like to do a constrained vc-relax such that only celldm(1) moves but all other celldm(2), ..., celldm(6) keep fixed.</div><div>I did not find the case in "cell_dofree" or maybe I am confused with the explanations in DOC. Also I looked at init_dofree in Modules/cell_base.f90</div><div>and still confused.</div><div>Could anybody please help to identify the proper option?</div><div>Thanks in advance.</div><div><br></div><div>Best regards,</div><div><br><div>Mahmoud Payami</div><div>NSTRI, AEOI</div><div>Tehran, Iran</div><div>Email: mpayami@aeoi.org.ir</div><div>Phone: +98(0)2182066504</div><div>------------------------------------<br></div></div></div>