I want to plot the phonon dispersion of Au. I successfully ran pw.x and ph.x. (I am sharing the input files as follows). However, while running q2r.x, I have found the error " nc already filled: wrong q grid or wrong nr". Would you please see the inputs where I have made any mistakes?

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&CONTROL   calculation = 'scf'   outdir = './out/'   prefix = 'Au'   pseudo_dir = './' / &SYSTEM   degauss =  0.01   ecutwfc =   100   ibrav = 0   nat = 1   ntyp = 1   occupations = 'smearing'   smearing = 'mp'   nosym = .TRUE.   noinv = .TRUE. / &ELECTRONS   diagonalization='cg'   conv_thr =   1.0e-10   mixing_beta =   0.4 / ATOMIC_SPECIES Au     196.966569 Au_ONCV_PBEsol-1.0.upf ATOMIC_POSITIONS crystal Au           0.0000000000       0.0000000000       0.0000000000 K_POINTS automatic 15 15 15 0 0 0 CELL_PARAMETERS angstrom    0.000000235   2.037568691   2.037568574    2.037568691   0.000000117   2.037568574    2.037568691   2.037568574   0.000000000

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Ph.x

&inputph     amass(1) = 196.966569,     prefix = 'Au',     outdir = './out',     ldisp = .true.,     fildyn = 'Au.dyn',     tr2_ph = 1.0d-14,     nq1 = 4,     nq2 = 4,     nq3 = 4 /

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q2r.x

&input fildyn = 'Au.dyn' zasr = 'crystal' flfrc = 'Au.fc' /

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The error message while running q2r.x is:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%      task #        36     from init : error #         1        nc already filled: wrong q grid or wrong nr %%%%%%%%%%%%%%%%%%%%%%%%%%%%%      nc already filled: wrong q grid or wrong nr Thank you in advance for your time.