MPI command question

Dear all,

I use MPI to run program for the given work path. The program works when I run the following command:

mpiexec -wdir "Z:\test" -host 1 n01 1 z:\fem

However, when running the following command:

mpiexec -wdir "Z:\test" -n 1 z:\fem

The program displayed the following error:

forrtl: severe (29): file not found, unit 1, file C:\Windows\system32\parainfo\control.dat

The 'control.dat' is placed at z:\test\parainfo, and the program will search for 'control.dat' from 'parainfo' automatically.

Is there anything I missed to use MPI by latter command?

Thanks,

Zhanghong Tang