I tried to do the scf calculation on a perturbated cell. I used
"CELL_PARAMETERS alat" to specify vector. However, I got an error.

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     Error in routine set_sym_bl (3):
     wrong number of symmetries! Use standard orientations for axis
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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.

-- 
Mingkai Li
=======================================================
School of Material Science and Engineering
Hubei University
Wuhan, Hubei Province
P. R. China
=======================================================
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