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--></style></head><body lang=EN-US style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Dear experts, I am doing an scf calculation taking lmbj potential. My system is a slab of 6ql with a vacuum of 40 ang along c-axix. Whenever I try to run the scf calculation including SOC, after 999 iteration the scf is still not converged. I have analyzed the scf file, it shows the fluctuating nature. At first the selected Rmt was 2.5 then I reduces it to 2.34 and again convergence failed after 999 cycle. I have included -hdlo and -lvns 8 switch in init_lapw as it shows heavy atom. I am attaching the case.struct file. Hoping for any suggestion/solution. </p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Regards<o:p></o:p></p><p class=MsoNormal>Burhan Ahmed<o:p></o:p></p><p class=MsoNormal><b>Research Scholar, AUS <o:p></o:p></b></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>