Learning Forum

[schinta3]

Hello,

We recently upgraded our license manager to the newest version, and are attempting to deploy Lumeriacl on a remote cluster (Linux) as an Lmod module. I am running into a few issues.

>The license server does respond to pings, and the port 1055 is open.
>Any Lumerical app runs fine on any local computer
> The GUI itself runs remotely on the cluster as well through a vnc, but invoking the fdtd engine through the command line does NOT work.

The command:
$singularity exec /data/apps/extern/singularity/lumerical/Lumerical_DID_8.18.1333.sif env | grep ANSYSLMD_

succesfully gives back the correct IP:Port which is the active license server.

$singularity exec /data/apps/extern/singularity/lumerical/Lumerical_DID_8.18.1333.sif fdtd-engine-impi-lcl *.fsp

Throws 

any advice is appreciated!

 

 

 

 

 

 

[Lito]

• Which Linux distro and version are you running on the cluster?
• Which version of Lumerical are you using? 
• To clarify, you can open and run the Lumerical CAD on the same node/host (login.rockfish.jhu.edu) -- where you are having issues running the simulation.fsp file from? 
• Or you are opening the Lumerical CAD via VNC on a different node/host on the cluster not on the node (login.rockfish.jhu.edu)? 

[schinta3]

Hello,

 

>Rocky Linux release 8.8 (Green Obsidian)

>Lumerical 2024 R1.3 

Right now, we can open and run Lumerical on other laptops/desktops that can access our existing server on the same network. Essentially the above error is thrown when I try to run the fdtd-engine from command line, while this SLURM script with those commands send the job to a compute node, despite having the correct ANSYSLMD environmental variable.

[Lito]

Is the cluster on the same network as the laptop/desktop and the license server?

Ensure that the compute nodes can access/connect to the license server on ports used in the license file on the server (default: 1055 & 1056).  

Are you able to check the license manager status on the server from the compute nodes? 
>>> How to check license status and availability (from the client machine running Lumerical) 

Does it show the LM up and running and the available licenses for checkout? 

[schinta3]

Hi,

 

The cluster is on the same network as the other local computers. The compute node can succesfully ping the license server. However Lumerical is in an LMOD module, so I cannot access this command. Is there a way to run through an lmod module?

• • /opt/lumerical/v241/licensingclient/linx64/lmutil lmstat -c 1055@licserver01 -a

 

 

 

 

Best,

Sreyas

[Lito]

@schinta3, 

• Ensure that the cluster nodes are allowed/can access the server on the 2 ports used in the license file in the Ansys LM. Typically, 1055 & 1056
  >> Configuring the Ansys license manager for shared access – Ansys Optics 
• After loading the module for Lumerical, what is the path for fdtd-solutions? Enter the command below in a terminal session.

which fdtd-solutions 

• Have you configured the cluster to checkout the license from your server? 
  
  • Lumerical license configuration with the Ansys Optics Launcher
  • Lumerical license configuration from the command line
• Send the output of the following (from the terminal):

cat ~/.config/Lumerical/License.ini 
env | grep ANSYS

• **Do not run from the Lumerical CAD/GUI.
• Please send the submission script you are using to submit/run the simulation.fsp file on your cluster.