<div>Dear developers:</div>
<div>I use GWW to calculate my 2D unit cell with 2C and 2F atoms,first I have performed  <a href="http://scf_head.in">scf_head.in</a> with pw.x code ,it works well.Then I have a ph calculation at Gamma with head.x but it appears:</div>

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<div> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<br>     task #         0<br>     from solve_e : error #         1<br>     called in the wrong case<br> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<br>
My input file is:</div>
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<div>&control<br>    title='gf'<br>    calculation='scf',<br>    restart_mode='from_scratch',<br>    prefix='gf'<br>    pseudo_dir = '/home/sdwang/espresso-4.1.2/pseudo',<br>    outdir='/home/sdwang/gw/tmp'<br>
/<br>&system    <br>    ibrav = 4, celldm(1)=4.839,celldm(3)=7.023,nat=4, ntyp=2,<br>    ecutwfc = 60.0,nosym=.false., occupations='smearing',degauss=0.01,smearing='gaussian'               <br>/<br>&electrons<br>
    diagonalization='david',<br>    conv_thr =  1.0d-10,<br>    mixing_beta = 0.5,<br>    startingwfc='random',<br>/<br>ATOMIC_SPECIES<br> C   12.0  C.pz-vbc.UPF<br> F   19.0  F.pz-rrkj.UPF   <br>ATOMIC_POSITIONS (crystal)<br>
C        0.331724716   0.667136313   0.096514182<br>C        0.665075100   0.333783657   0.069110636<br>F        0.331574264   0.667153962   0.171629429<br>F        0.665085920   0.333706069  -0.005994247<br>K_POINTS (automatic)<br>
9 9 1  0 0 0<br> </div>
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<div>phonons of gf at Gamma<br> &inputph<br>  tr2_ph=1.d-4,<br>  prefix='gf',<br>  outdir='/home/sdwang/gw/tmp/',<br>  epsil=.false.,<br>  amass(1)=12.0,<br>  amass(2)=19.0<br>  fildyn='gf.dynG',<br>
  recover=.false.<br>  trans=.false.<br>  l_head=.true.<br>  omega_gauss=20.<br>  n_gauss=79<br>  grid_type=2<br>  niter_ph=1<br> /<br>0.0 0.0 0.0<br></div>
<div>What is my problem?</div>
<div>Thanks!!</div>