Mode Solver on a CLuster

- February 1, 2023 at 10:00 pm
  
  schinta3
  Subscriber
  
  Hello,
  We have an HPC cluster with only headless nodes (no X11 forwarding). Is there any way to run MODE without the GUI, or process .lms files in any way?
  
  Essentially we would like to use this methodology https://optics.ansys.com/hc/en-us/articles/1500006208582-Sweep-analysis-for-dispersion-calculations from command line.
- February 2, 2023 at 5:27 pm
  Lito Yap
  Ansys Employee
  @schinta3,
  You cannot run the Lumerical "script.lsf" on a headless cluster. Lumerical scripts require a GUI connection to run.
  >>Lumerical product components and licensing overview – Ansys Optics
  You can only run the "simulation_file.lms" directly from the terminal or on your cluster's job scheduler submission script.
  >>Running simulations using terminal in Linux – Ansys Optics
  The command line to run the "simulation.lms" file would be something like this: (default install path for 2023 R1 shown)
```
/opt/lumerical/v231/mpich2/nemesis/bin/mpiexec -n 4 /opt/lumerical/v231/bin/fd-engine -t 1 simulationfile.lms
/opt/lumerical/v231/mpich2/nemesis/bin/mpiexec -n 4 /opt/lumerical/v231/bin/eme-engine-mpich2nem -t 1 simulationfile.lms
/opt/lumerical/v231/mpich2/nemesis/bin/mpiexec -n 4 /opt/lumerical/v231/bin/varfdtd-engine-mpich2nem -t 1 simulationfile.lms
```
  See also the KB guide below on how to run sweeps without the CAD.
  >>Running parameter sweeps without the CAD – Ansys Optics
  Hope this helps.

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