mpirun and mpiexec using problem

nohup /home/shao_**/anaconda3/envs/for_ULSA/bin/mpirun -n 3 python -u Run_skymap.py >output_new.txt 2>&1 &

default mpiexec using

/home/shao_**/intel/oneapi/mpi/2021.5.0/bin/mpirun above is not work