FreeFem++-mpi .exe failed to run example mpi.edp

Hello everyone, MSMPI has been successfully debugged, with cmd

(C:>“Program Files\Microsoft MPI\Bin\mpiexec.exe”)

can be successfully started, FreeFem+±mpi .exe

(C:>“Program Files (x86)\FreeFem++\FreeFem+±mpi.exe”)

can also be successfully started. However, with the following command, access is denied, why?

(C:>“Program Files\Microsoft MPI\Bin\mpiexec.exe” -n 1 C:>“Program Files (x86)\FreeFem++\FreeFem+±mpi.exe” Stokes-v2-matrix-mumps.edp)