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<div>Dear developers,</div><div> I tried to calculate phonon dispersion using image parallelization. But I found the No 4,5,6 Dynamical matrix files are 0 size with no content at all. There is no such problem when using default parallelization. What is wrong?</div><div> I have tried version 6.1 and dev version, both got the same problem.</div><div> In the end I attached scf.in file and ph.in file.<br> and here is how I run it<br> mpiexec.hydra -n 16 pw.x -in scf.in > scf.out<br> mpiexec.hydra -n 16 ph.x -nimage 4 ph.in > ph.out</div><div><br></div><div>best regards</div><div><br></div><div>----------------</div><div>scf.in</div><div>------------------</div><div><div>&CONTROL</div><div>prefix='silicon_ibrav',</div><div>calculation='scf',</div><div>restart_mode='from_scratch',</div><div>wf_collect=.true.,</div><div>verbosity='high',</div><div>tstress=.true.,</div><div>tprnfor=.true.,</div><div>outdir='./qe_tmpdir',</div><div>pseudo_dir='./pseudo',</div><div>/</div><div>&SYSTEM</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>ibrav=2,celldm(1)=10.33473316097d0,nat = 2,ntyp = 1,</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>ecutwfc = 44 ,ecutrho = 175 ,</div><div>/</div><div>&ELECTRONS</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>conv_thr = 1.0d-10, </div><div>/</div><div>ATOMIC_SPECIES</div><div>Si 28.0855 Si.pbe-n-rrkjus_psl.1.0.0.UPF</div><div>ATOMIC_POSITIONS crystal</div><div>Si<span class="Apple-tab-span" style="white-space:pre"> </span>0.75d0<span class="Apple-tab-span" style="white-space:pre"> </span>0.75d0<span class="Apple-tab-span" style="white-space:pre"> </span>0.75d0</div><div>Si<span class="Apple-tab-span" style="white-space:pre"> </span>0.5d0<span class="Apple-tab-span" style="white-space:pre"> </span>0.5d0<span class="Apple-tab-span" style="white-space:pre"> </span>0.5d0</div><div>K_POINTS automatic</div><div>4 4 4 1 1 1</div></div><div><br></div><div>-------------</div><div>ph.in</div><div>-------------</div><div><br></div><div><div>------PHonon dispersion calculation------</div><div>&INPUTPH</div><div>prefix='silicon_ibrav',</div><div>outdir='./qe_tmpdir',</div><div>tr2_ph=1.d-16,</div><div>fildyn='silicon_ibrav.matdyn_disp',</div><div>epsil=.true.,</div><div>ldisp=.true.,</div><div>nq1=4,nq2=4,nq3=4,<span class="Apple-tab-span" style="white-space:pre"> </span>! q grid</div><div>/</div></div><div> </div><div id="ntes-pcmail-signature" style="font-family:'微软雅黑'"><font style="padding: 0; margin:0;"> </font>
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