FDS Simulation problem


I am facing a problem with running the Fire modelling in Linux Server. The FDS version i am using is FDS6.7.1; The problem is, after successfully running the modelling in remote PC through Linux server; whenever I closed the terminal; my modelling stopped running. It happened several times.
The command I am using to run the FDS simulation is : nohup mpirun -np 4 ./fds_6.7.1 Run9.fds &
So “nohup” is to run the model without terminal; but whenever i disconnected the terminal the model stopped running. Can anyone tell me what is the issue?