<div>Dear all:</div>
<div>   When I caculated the phonon of SnO at Gamma point using the version3.0, a part of the result as below:</div>
<div> 
<p> Raman tensor (A^2)</p>
<p>     atom #    1    pol.  1<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00
      0.000000000000E+00<br>     atom #    1    pol.  2<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00
      0.000000000000E+00      0.000000000000E+00<br>     atom #    1    pol.  3<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00
<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>     atom #    2    pol.  1<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00
      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>     atom #    2    pol.  2<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00
      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>     atom #    2    pol.  3<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00
<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>     atom #    3    pol.  1<br>      0.000000000000E+00      0.000000000000E+00
      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br> 0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>     atom #    3    pol.  2<br>      0.000000000000E+00
      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>     atom #    3    pol.  3
<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00
<br>     atom #    4    pol.  1<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00
      0.000000000000E+00<br>     atom #    4    pol.  2<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00
      0.000000000000E+00      0.000000000000E+00<br>     atom #    4    pol.  3<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00
<br>      0.000000000000E+00      0.000000000000E+00      0.000000000000E+00<br>all the values or Raman tensor are zero, I think there is no error in my inputfile, and my input file as below:</p>
<p> phonons of SnO at Gamma<br> &inputph<br> tr2_ph=1.0d-15,<br>  prefix='SnO',<br>  epsil=.true.,<br>  amass(1)=118.69,<br>  amass(2)=15.999,<br>  trans=.true.,<br>  lraman=.true.,<br>  elop=.true.<br>  recover=.true.
<br>  outdir='/pwscftmp/lyw/tmp/tmp1/',<br>  fildyn='SnO.dynG',<br> fildrho='SnO.drho',<br> /<br>0.0 0.0 0.0<br>Waiting for your help! thank you!</p></div>