Dear Hana, Firstly it's better to compile the code in serial mode, if is OK then you can do in parallel mode. If it's still error, in principle it comes from MPI problems (OpenMPI installed, mpif90, libraries,...). Intel compilers and lntel library are free for Linux, you can get the best perfomence with Intel's, I can send you the arch.make for Intel and OpenMPI if you like. Hope this help,
Nguyen, Ngoc Ha Hanoi National University of Education Faculty of Chemistry Department of Physical Chemistry Tel: Office: 04/8330842 Home: 04/7891674 Mobile: 0989133436