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<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255);float:none;display:inline">Dear PWSCF users/experts,</span><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)">While calculating phonon for few different pressures (for instance, 26 GPa, 28 GPa, 30 GPa, 32GPa ) of my system, first I performed q2r.x calculation and it successfully read force constant from the file. After that when I was performing matdyn.x calculation, I found the following error only for 30 GPa Pressure. When I did the same calculations for other different pressures mentioned above, everything works well.<img src="cid:ii_jeuejqow0_1623085bb344f431" width="544" height="75" class="gmail-m_-6451027371988742552gmail-CToWUd gmail-CToWUd"><br>I also tried some possible solutions from this link <a href="http://qe-forge.org/pipermail/pw_forum/2012-August/099250.html" target="_blank" style="color:rgb(17,85,204)">http://qe-forge.org/piper<wbr>mail/pw_forum/2012-August/0992<wbr>50.html</a><span> </span>, but I still found the same problem. Could you please help me to understand what's the problem?</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)">Thank you.</div>

Hari Paudyal<div>SUNY Binghamton, USA.</div></div>