This is because the atomic spheres overlap. So, you have to choose smaller spheres radii.
On Sun, 22 Dec 2013, Muhammad Sajjad wrote:
Dear all I am running optimization with wien2k 12 version. I am facing the following error ERROR status in OPTF123_vol__-5.0 > stop error NN - Error LAPW0 Kindlyhelp me to solve this propblem. Kind Regards
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