also [fkomijani@localhost examples_graphics]$ cd /home/fkomijani/mpich2-1.4.1p1/examples $ make hellow CC hellow.c ../bin/mpicc -o hellow hellow.o [fkomijani@localhost examples] $ mpirun -n 2 ./hellow Hello world from process 0 of 2 Hello world from process 1 of 2 it is necessary to say that i was able to run uncoupled test successfully. i face with above error for coupled model.