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<div>Dear Lorenzo Paulatto,</div><div>    Thank you so much for reply.</div><div>    I tried two case: graphite and MoS2, both are ibrav=4. Surprisingly, graphite has no problem, however, MoS2 has problem.<br>    I packed all test file of both graphite and MoS2 as zip on google drive: <a href="https://drive.google.com/open?id=1_vnmkRMsugPjI1gllSQ7us6Q7hxLwa-D" _src="https://drive.google.com/open?id=1_vnmkRMsugPjI1gllSQ7us6Q7hxLwa-D" style="line-height: 1.7;">https://drive.google.com/open?id=1_vnmkRMsugPjI1gllSQ7us6Q7hxLwa-D</a></div><div>    By the way, I previously made a post about the bug in phonon grid calculation, but no one replied. Here is the post link <a href="https://www.mail-archive.com/pw_forum@pwscf.org/msg32635.html" _src="https://www.mail-archive.com/pw_forum@pwscf.org/msg32635.html" style="line-height: 1.7;">https://www.mail-archive.com/pw_forum@pwscf.org/msg32635.html</a> . <span style="line-height: 1.7;">Would you please help take a look?  Really appreciate your help.</span></div><div><span style="line-height: 1.7;"><br></span></div><div><span style="line-height: 1.7;">best regards</span></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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