How to use MPI in EFDC+

I want to know how to use mpi by fortan file in EFDC+,I try to rewrite decomp.jnp file but can not deal it,I real want to know how to run in multithreading by using fortran file.could you five me a modle example.

Have you referred to the user guidance here?
Are you using EE to set the decomp.jnp?