Win 64 lib was downloaded from: http://www.mpich.org/ Version: mpich2-1.4.1p1-win-x86-64.msi Notice: SMPD and MPICH2 must be used in match. In Win32 dir: smpd version 1.0.8.p1, provided by mpich.org In Win64 dir: smpd version 1.4.1.p1. Intel Fortran version 12, in c:\Program Files (x86)\Common Files\Intel\Shared Libraries\redist\intel64\mpirt\: smpd version 3.1, provided by Intel. Intel Fortran version 13, in c:\Program Files (x86)\Common Files\Intel\Shared Libraries\redist\intel64\mpirt\: smpd version 4.1