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<p>Dear Quantum Espresso users,<br>
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<p>I am trying to run the ph.x executable using a simple silicon example which I found online. I first perform the scf calculation and save the results and then use the same outdirectory and prefix when running the ph.x code. However, I keep getting the same
error which says:<br>
</p>
<p>'Error in routine image_q_irr (1):<br>
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<p> some images have no rapp'<br>
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<p>I have attached the ph input file.<br>
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<p>I would really appreciate it if someone can help explain to me why this is happening.<br>
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<p><br>
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<pre style="word-wrap: break-word; white-space: pre-wrap;">Phonons of Si at Gamma
&inputph
tr2_ph=1.0d-14,
amass(1)=28.0855,
prefix='SIPH',
outdir='/nfs/11/osu7834/'
fildyn='si.dynG',
/
0.0 0.0 0.0<br></pre>
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<p>Thanks,</p>
<p>Adib Samin<br>
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<p style="font-size:13px; font-family:Tahoma"> </p>
<p style="font-size:13px; font-family:Tahoma">Adib Samin</p>
<p style="font-size:13px; font-family:Tahoma">Postdoc</p>
<p style="font-size:13px; font-family:Tahoma">The Department of Aerospace and Mechanical Engineering</p>
<p style="font-size:13px; font-family:Tahoma">The Ohio State University <br>
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