[vijayp@node4 input]$ /opt/mvapich-1.1_intel/bin/mpirun -np 16 /opt/amber10/bin/sander.MPI   -i prod.in -o mdout.out -p 1lis.prmtop -c eq.rst
node3.niper.in: Connection refused
p0_28064:  p4_error: Child process exited while making connection to remote process on nod e3: 0
[vijayp@node4 input]$ /opt/mvapich-1.1_intel/bin/mpirun -machinefile hostfile -np 16 /opt/     amber10/bin/sander.MPI -i prod.in -o mdout.out -p 1lis.prmtop -c eq.rst
p9_25098: (930.805760) net_recv failed for fd = 7
p1_24990: (931.112960) net_recv failed for fd = 10
p9_25098:  p4_error: net_recv read, errno = : 110
p1_24990:  p4_error: net_recv read, errno = : 104
p14_28669:  p4_error: net_recv read:  probable EOF on socket: 1