[root@localhost INGT]# mpirun -np 24 mdrun_mpi -v -deffnm npt

Error - 

/usr/bin/mpdroot: open failed for root's mpd conf filempiexec_localhost.localdomain (__init__ 1208): forked process failed; status=255

I complied gromacs using - ./configure --enable-shared --enable-mpi. I have installed the mpich package , this is what I get when I check for mpirun and mpiexec -

[root@localhost /]# which mpirun
/usr/bin/mpirun
[root@localhost /]# which mpiexec
/usr/bin/mpiexec

What could be the problem here ??

Thanks

-------- 
Bharat