<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1483877874491_4348">Dear Wien2k users</div><div id="yui_3_16_0_ym19_1_1483877874491_4365"><br></div><div id="yui_3_16_0_ym19_1_1483877874491_4409" dir="ltr">I just want to know why fftw and mpich should be installed before installing wien2k12.</div><div dir="ltr" id="yui_3_16_0_ym19_1_1483877874491_4434">Are they necessary for doing the calculation parallel?</div><div dir="ltr" id="yui_3_16_0_ym19_1_1483877874491_4471"> should I install Mpich and Fftw according to this fact that I want to do the calculation in a single core?</div><div dir="ltr" id="yui_3_16_0_ym19_1_1483877874491_4504">Best Regards</div><div dir="ltr" id="yui_3_16_0_ym19_1_1483877874491_4564">Sahraii<br></div><div id="yui_3_16_0_ym19_1_1483877874491_4388"><br></div></div></body></html>