<div dir="auto"><div>You have not provided enough information for a full diagnosis. When does this occur, right at the beginning? Are you using runsp? How much vacuum? What RKMAX? Do you have ELPA? What version of Wien2k? K-points? Minimisation? Which iterative? When are you using the iterative, in the 2nd cycle?</div><div dir="auto"><br></div><div dir="auto">Some suggestions:</div><div dir="auto">* Reduce the Ba RMT to 2.1. You may need to use -ecut .998 during initialization.</div><div dir="auto">* Use a vacuum of at most 1/3 of full unit cell. 20au is often enough, 30 certainly, 40 is excessive.</div><div dir="auto">* Minimize first you 1x1x15 cell with no vacancy & P4mm symmetry. Check it is a sensible insulator. If not then everything is wrong.</div><div dir="auto">* Remove, manually the Ti 3d search, as it is less stable.</div><div dir="auto">* Use ELPA not iterative. While iterative may be faster per cycle, it can lead to more iterations and less stability so the nett is slower. For certain I would not use it for a surface until I have somewhat converged. (You have to be in the space of densities where you have ions as against the initial neutral atoms.)</div><div><br></div><div data-smartmail="gmail_signature">--<br>Professor Laurence Marks (Laurie)<br>Northwestern University<br><a href="http://www.numis.northwestern.edu">www.numis.northwestern.edu</a><br><a href="https://scholar.google.com/citations?user=zmHhI9gAAAAJ&hl=en">https://scholar.google.com/citations?user=zmHhI9gAAAAJ&hl=en</a><br>"Research is to see what everybody else has seen, and to think what nobody else has thought" Albert Szent-Györgyi</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 27, 2024, 21:22 Natalia Andreeva <<a href="mailto:nvandr@gmail.com">nvandr@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear Win2k users,<br><br> I am trying to calculate a sufficiently large 2x3x15 supercell based on a tetragonal barium titanate (BaTiO3) cell. In this calculation, I create an oxygen vacancy and a surface. The calculation is successfully initialized with the parameters of atomic spheres equal to Rmt(Ba)=2.30, Rmt(Ti)=1.82, Rmt(O)=1.65. However, when I run the calculation with PBE, iterative diagonalization, an error appears:<br><br>** Error in Parallel LAPW1<br>** LAPW1 STOPPED<br>** check ERROR FILES!<br>Cholesky INFO = 9896<br>'SECLR4' - POTRF (Scalapack/LAPACK) failed.<br><br>I tried to find an answer in WIEN2k's letters – among the suggestions was rerun the calculation after setting other initial electron density parameters (dstart), changing the radii of atomic spheres, and others, but they did not help. What could I do to run this calculation correctly?<br><br><br>Thank you in advance,<br>Best Regards,<br>Natalia<div style="font-size:0.875rem;padding:0px;width:auto;border-bottom-left-radius:0px;border-bottom-right-radius:0px;border-top:none;margin:0px;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;font-family:"Google Sans",Roboto,RobotoDraft,Helvetica,Arial,sans-serif"><div style="border-top:0px;padding:0px"><div style="clear:both;margin:0px;padding:16px 0px;border-top:none"><div id="m_6282082857591787142gmail-:1l5"><table role="presentation" style="border-collapse:collapse"><tbody><tr><td style="padding:0px 16px;vertical-align:top;width:44px"><img id="m_6282082857591787142gmail-:oo_29" name="m_6282082857591787142_gmail-:oo" src="https://lh3.googleusercontent.com/a/ACg8ocIOyRayrBJSUldsmTO9HJh1dtAiQZEqKNIXFjh6kPdWDIt2=s40-p" style="width:40px;height:40px;border-radius:50%;display:block"></td><td style="padding:0px;width:1052px"><div style="box-sizing:border-box;border-radius:1px;padding:0px;border:none;margin:0px"><div style="color:inherit;height:auto;padding:0px;display:flex;line-height:20px"><div><div id="m_6282082857591787142gmail-tt-c162" role="tooltip" aria-hidden="true" style="height:1px;overflow:hidden"><br>Add reaction</div></div></div></div></td></tr></tbody></table></div></div></div></div></div>
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