---
title: ANSYS HFSS / ElectroMagnetics
#tags:
keywords: software, ansys, ansysEM, em, slurm, hfss, interactive, rsm, batch job
last_updated: 07 September 2022
summary: "This document describes how to run ANSYS HFSS (ElectroMagnetics) in the Merlin6 cluster"
sidebar: merlin6_sidebar
permalink: /merlin6/ansys-hfss.html
---

This document describes the different ways for running **ANSYS HFSS (ElectroMagnetics)**

## ANSYS HFSS (ElectroMagnetics)

This recipe is intended to show how to run ANSYS HFSS (ElectroMagnetics) in Slurm.
Having in mind that in general, running ANSYS HFSS means running **ANSYS Electronics Desktop**.

## Running HFSS / Electromagnetics jobs

### PModules

Is necessary to run at least ANSYS software **ANSYS/2022R1**, which is available in PModules:

```bash
module use unstable
module load Pmodules/1.1.6
module use overlay_merlin
module load ANSYS/2022R1
```

## Remote job submission: HFSS RSM and SLURM

Running jobs through Remote RSM or Slurm is the recommended way for running ANSYS HFSS.
* **HFSS RSM** can be used from ANSYS HFSS installations running on Windows workstations at PSI (as long as are in the internal PSI network).
* **Slurm** can be used when submitting directly from a Merlin login node (i.e. `sbatch` command or interactively from **ANSYS Electronics Desktop**)

### HFSS RSM (from remote workstations)

Running jobs through Remote RSM is the way for running ANSYS HFSS when submitting from an ANSYS HFSS installation on a PSI Windows workstation.
A HFSS RSM service is running on each **Merlin login node**, and the listening port depends on the ANSYS EM version. Current support ANSYS EM RSM
release and associated listening ports are the following:

<table>
  <thead>
   <tr>
   <th scope='col' style="vertical-align:middle;text-align:center;">ANSYS version</th>
   <th scope='col' style="vertical-align:middle;text-align:center;">Login nodes</th>
   <th scope='col' style="vertical-align:middle;text-align:center;">Listening port</th>
   </tr>
  </thead>
  <tbody>
   <tr align="center">
   <td>2022R1</td>
   <td><font size="2" face="Courier New">merlin-l-001 merlin-l-001 merlin-l-001</font></td>
   <td>32958</td>
   </tr>
   <tr align="center">
   <td>2022R2</td>
   <td><font size="2" face="Courier New">merlin-l-001 merlin-l-001 merlin-l-001</font></td>
   <td>32959</td>
   </tr>
   <tr align="center">
   <td>2023R2</td>
   <td><font size="2" face="Courier New">merlin-l-001 merlin-l-001 merlin-l-001</font></td>
   <td>32960</td>
   </tr>
  </tbody>
</table>

Notice that by default ANSYS EM is listening on port **`32958`**, this is the default for **ANSYS/2022R1** only.
* Workstations connecting to the Merlin ANSYS EM service must ensure that **Electronics Desktop** is connecting to the proper port.
* In the same way, the ANSYS Workstation version must be the same as the version running on Merlin.

Notice that _HFSS RSM is not the same RSM provided for other ANSYS products._ Therefore, the configuration is different from [ANSYS RSM](/merlin6/ansys-rsm.html).

To setup HFSS RSM for using it with the Merlin cluster, it must be done from the following **ANSYS Electronics Desktop** menu:

1. **[Tools]->[Job Management]->[Select Scheduler]**.
![Select_Scheduler]({{"/images/ANSYS/HFSS/01_Select_Scheduler_Menu.png"}})
2. In the new **[Select scheduler]** window, setup the following settings and **Refresh**:
![RSM_Remote_Scheduler]({{"/images/ANSYS/HFSS/02_Select_Scheduler_RSM_Remote.png"}})
* **Select Scheduler**: `Remote RSM`.
* **Server**: Add a Merlin login node.
* **User name**: Add your Merlin username.
* **Password**: Add you Merlin username password.

    Once *refreshed*, the **Scheduler info** box must provide **Slurm** information of the server (see above picture). If the box contains that information, then you can save changes (`OK` button).
3. **[Tools]->[Job Management]->[Submit Job...]**.

![Submit_Job]({{"/images/ANSYS/HFSS/04_Submit_Job_Menu.png"}})

4. In the new **[Submite Job]** window, you must specify the location of the **ANSYS Electronics Desktop** binary.
![Product_Path]({{"/images/ANSYS/HFSS/05_Submit_Job_Product_Path.png"}})
* In example, for **ANSYS/2022R1**, the location is `/data/software/pmodules/Tools/ANSYS/2021R1/v211/AnsysEM21.1/Linux64/ansysedt.exe`:.

### HFSS Slurm (from login node only)

Running jobs through Slurm from **ANSYS Electronics Desktop** is the way for running ANSYS HFSS when submitting from an ANSYS HFSS installation in a Merlin login node. **ANSYS Electronics Desktop** usually needs to be run from the **[Merlin NoMachine](/merlin6/nomachine.html)** service, which currently runs on:
- `merlin-l-001.psi.ch`
- `merlin-l-002.psi.ch`

Since the Slurm client is present in the login node (where **ANSYS Electronics Desktop** is running), the application will be able to detect and to submit directly to Slurm. Therefore, we only have to configure **ANSYS Electronics Desktop** to submit to Slurm. This can set as follows:

1. **[Tools]->[Job Management]->[Select Scheduler]**.
![Select_Scheduler]({{"/images/ANSYS/HFSS/01_Select_Scheduler_Menu.png"}})
2. In the new **[Select scheduler]** window, setup the following settings and **Refresh**:
![RSM_Remote_Scheduler]({{"/images/ANSYS/HFSS/03_Select_Scheduler_Slurm.png"}})
* **Select Scheduler**: `Slurm`.
* **Server**: must point to `localhost`. 
* **User name**: must be empty.
* **Password**: must be empty.
    The **Server, User name** and **Password** boxes can't be modified, but if value do not match with the above settings, they should be changed by selecting another Scheduler which allows editig these boxes (i.e. **RSM Remote**).

    Once *refreshed*, the **Scheduler info** box must provide **Slurm** information of the server (see above picture). If the box contains that information, then you can save changes (`OK` button).