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Hi everyone,</div>
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I ran a ph.x-calculation with such input:</div>
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```</div>
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&Inputph</div>
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outdir = './'</div>
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prefix = 'rutile'</div>
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fildyn = 'rutile.dyn'</div>
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nq1 = 3</div>
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nq2 = 3</div>
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nq3 = 3</div>
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ldisp = .true.</div>
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verbosity = 'high'</div>
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tr2_ph = 1.0d-14</div>
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nmix_ph = 10</div>
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/</div>
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```</div>
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and the procedure has terminated correctly, I cannot attach the output file due to its size, but the phonons calculated in each selected point are positive.</div>
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Then I ran a q2r.x calculation with this input:</div>
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```</div>
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&INPUT</div>
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prefix = 'rutile'</div>
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fildyn = 'rutile.dyn'</div>
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flfrc = 'rutile.fc'</div>
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zasr = 'crystal'</div>
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/</div>
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```</div>
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and lately a matdyn.x with this input:</div>
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```</div>
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&INPUT</div>
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asr = 'crystal'</div>
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flfrc = 'rutile.fc'</div>
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flfrq = 'rutile.freq'</div>
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flvec = 'rutile.modes'</div>
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q_in_band_form = .true.</div>
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/</div>
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7</div>
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<br>
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0.0000000000 0.0000000000 0.0000000000 60 !GAMMA</div>
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0.5000000000 0.5000000000 0.0000000000 60 !M</div>
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0.0000000000 0.5000000000 0.0000000000 60 !X</div>
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0.0000000000 0.0000000000 0.0000000000 60 !GAMMA</div>
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0.0000000000 0.0000000000 0.5000000000 60 !Z</div>
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0.0000000000 0.5000000000 0.5000000000 60 !R</div>
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0.5000000000 0.5000000000 0.5000000000 60 !A</div>
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```</div>
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from the latter, I obtain negative (immaginary) frequency in the output, and in general the bands are all messed up, while the frequency obtained in the first ph.x step are reasonable.</div>
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Is it an error? How do I get rid of it?</div>
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Thank you in advance!</div>
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