Dear QE users,
I want to use QE to calculate photon dispersion by ph.x, but I face with a problem: Error in routine divide_class (1): Wrong classes for C_3v and my ph.x input file &INPUTPH outdir='/home/MS70/Clarence/cubr/phonon', verbosity='low', prefix = 'unit' , tr2_ph = 1.0d-14 , ldisp = .true. , fildyn = '/home/MS70/Clarence/cubr/phonon/unit.dyn' , fildrho ='cubr.drho' , nq1 = 8 , nq2 = 8 , nq3 = 1 , / Many thanks. LIANG Xiongyi City University of Hong Kong
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