<p dir="ltr">(I was referring to symmetries of the lattice alone, not symmetries of the crystal; if you are sure that the crystal has no symmetries, commenting out the check should do the job)</p>
<div class="gmail_extra"><br><div class="gmail_quote">Il 15/ott/2016 11:13 AM, "Paolo Giannozzi" <<a href="mailto:p.giannozzi@gmail.com">p.giannozzi@gmail.com</a>> ha scritto:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">In order to find symmetries, the code uses a threshold to decide if a rotated vector is the same as the original one. It may sometimes happen that some "quasi-symmetries" are recognized as symmetries, some are not, leading to a "symmetry group" that is not a group. This is likely what happened in your case. Paolo</p>
<div class="gmail_extra"><br><div class="gmail_quote">Il 15/ott/2016 01:27 AM, "Li Mingkai" <<a href="mailto:mingkaili@gmail.com" target="_blank">mingkaili@gmail.com</a>> ha scritto:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I tried to do the scf calculation on a perturbated cell. I used "CELL_PARAMETERS alat" to specify vector. However, I got an error.<div><br></div><div><div> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%<wbr>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<wbr>%%%%%%%%%%%%%%%%%%%</div><div> Error in routine set_sym_bl (3):</div><div> wrong number of symmetries! Use standard orientations for axis</div><div> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%<wbr>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<wbr>%%%%%%%%%%%%%%%%%%%</div><div><br></div><div>Since the cell is perturbated, there is no symmetry on it and space group should be P1. But it seemed that the pw.x tried to find some symmetry and got wrong number of symmetries. I tried nosym, nosym_vec, no_inv. Nothing works. I tried old version down to 5.0, which worked. After version 5.1, the error emergied. Of course, I tried to use celldm(1)~(6). It works well for all version. Since this input file is generated by a script automatically. I don't tend to modify the script a lot and try to figure out what happened before change everything. </div><div><br></div>-- <br><div class="m_-8070164475723243529m_-5167577622735758746gmail_signature">Mingkai Li<br>==============================<wbr>=========================<br>School of Material Science and Engineering</div><div class="m_-8070164475723243529m_-5167577622735758746gmail_signature">Hubei University</div><div class="m_-8070164475723243529m_-5167577622735758746gmail_signature">Wuhan, Hubei Province</div><div class="m_-8070164475723243529m_-5167577622735758746gmail_signature">P. R. China<br>==============================<wbr>=========================<br></div>
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