<div dir="ltr"><br><br><div>Dear users,<br></div> I am doing an SCF calculation for monolayer PbI2 by means of exchange function gaupbe with SOC(spin-orbit coupling). The kmesh and qmesh used for this calculation are 15 x 15 x1 and 3x3x1, respectively. Just after it does the first step to refine exchange calculation it gives me an error "dexx is negative". However, I was able to run the same SCF calculation using the same kmesh but with different qmesh of size 1x1x1. I again get the same error when calculation is done with the qmesh of 1x1x1 and on full BZ kpoints of 15x15x1. I have also tried for a range of ecutfock from 360 to 600 Ry but I still end up getting the same error. <br><br>Can you please help me to understand and rectify this error? <br><br>Please find attached input and output files in this email.<br><div><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><div>Best Wishes<br>Vineet Kumar Pandey<br></div></div>IISER PUNE, INDIA<br></div>PINCODE-411008<br><br>Phone: +91 8853094275<br><br></div></div></div></div></div></div></div></div></div>
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