Dear Users I'm calculating the El Dens. but the error message appears. Commandline: x lapw2 -emin -1.0 -up Program input is: " " Segmentation fault 0.076u 0.004s 0:00.08 87.5% 0+0k 0+0io 0pf+0w error: command /WIENROOT/lapw2 uplapw2.def failed help