Dear Prof Blaha, Thank you for the reply. I have done the following steps and still the error persists.
x lapw1 -up -p x lapw1 -dn -p x lapwso -orb -up -p Then I have concatenated all the case.outputso_* files (all the 72 case.output files) into a single case.output1 file. then performed x lapw2 -so -fermi -up -p After that I opened xcrysden and clicked Render Fermi surface, but then I get an error ERROR:while executing wn_readbands program !!! Error message: STOP OPEN FAILED. I have tried multiple times but still not able to solve the error. For GGA+SOC without U, I have been able to plot the fermi surface, but with GGA+SOC+U I am having problems. Please provide some suggestions. Sincerely, Anup Pradhan Sakhya
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