Learning Forum

[kkuhn3]

Hello,

I (my graduate research program) have recently had to switch to licensing for LS-Dyna through ANSYS. I have been a Dyna user for 6 years from the LSTC side of things. I am responsible in my group for also setting up the server and previously had a Dyna LSTC server running on a linux machine. 

I successfully have the ANSYS server running on our RHEL machine. I have verified from my local windows machine that LS-Run 2025 R1 (downloaded as part of the ANSYS 2025) connects to the server and will run a sample test job (SMP 1 core) on my local machine. What I want to do is to be able to run/solve Dyna input files from the command line on the linux machine from the solver executables (SMP with multiple cores) as I previously did when we were under the LSTC system. When trying to run a job, I am returned an error message in the job log file that says the "license client cannot find any servers to talk to". This raises a few questions I have on this that might be the issue:

1. Is there documentation on how to make Dyna exectuables point to the ANSYS server, specifically in Linux? I of course have environment variables for LSTC pointed at the ANSYS port (1055). I also set an environment variable ANSYSLMD_LICENSE_FILE to the port and IP for the server. Recall I am trying to run Dyna jobs on the machine that is also the server.
2. Do I have to download updated ANSYS specific executable files which try connect to the ANSYS server rather than the LSTC server?
   1. If so, do I have to download the entire linux version of Ansys 2025 to get these or do the executables after a certain version do this from the LSTC website that is still linked through the ANSYS (https://ftp.lstc.com/user/download_page.html) page?
3. Surely, I am still able to submit Dyna jobs on linux through the command line (with the right executable) and don't have to have LS-Run on the Linux machine to batch and submit jobs?

Thanks!

[igandiko]

Hello, All recent executables support both Ansys and LSTC license, as long as correct environment variable is set. Please set below environment variable to use Ansys license.

export LSTC_LICENSE=Ansys

When you run the job in command line, the below output at the top indicates the solver is using Ansys license. If the output shows License option: check network license only, then the solver is trying to use LSTC network license. 

You do not need env LSTC_LICENSE=network and LSTC_LICENSE_SERVER=server. These two variables are needed for LSTC network license only. You also don't need LS-RUN to run the jobs. You can directly enter the solver command in the terminal or run the jobs through user-defined scripts. 

[kkuhn3]

 

Thank you for the reply. I have set the ENV variable to LSTC_LICENSE=Ansys. I do show now the “license option:check ansys licenses only” line in my job output text file. One more question, is I am now getting an ansys license manager error with a code of Error 70022 (OTH+22). I am trying to run the smp d R14.1 Dyna executable. My online search doesn’t yield much beyond a reddit post. Do I need to be on a more current executable version or is this a different issue?

I should also add, that my local windows machine will connect to the ANSYS server and run a sample job through LS-Run. I am also noting that the linux machine I am trying to run the executable on is also the server (local).

[igandiko]

Could you please share a screenshot of the error? Have you set env ANSYSLMD_LICENSE_FILE=1055@127.0.0.1? Do you have ansycl file located in the same directory as the solver? 

[kkuhn3]

I do have the ANSYSLMD_LICENSE_FILE=1055@my.server.IP environment variable set. Below is the error message. It is "Unable to connect to or start local server". I do not know what the ansycl file is, nor have it in the same directory as the solver. A search of both the linux system and and my windows system does not produce an ansycl file. What is it and where should I find it, assuming everything was installed in the default locations?

I am calling the solver the same way as I previously did using the command line. With the solver in the same directory as the input file $ ./solver_name i=input_name.k ncpu=xx memory=xx >output_text_file.txt. Does there have to be a call to ansys licensing system within the command? I assume not, since the top of my output file also has the line "License option : check ansys license only" as we discussed earlier.

 

[igandiko]

Hello, ansyscl is the license licent. This binary is provided with ls-dyna solver. If you downloaded standalone ls-dyna solvers, ansyscl is provided with the package. Please make sure this ansyscl exists in the same directory as ls-dyna solver. 

[kkuhn3]

Hello,

I wanted to bump this in case this came through too late on Friday. Hoping to get this figured out this week.

 

[OAN]

Was this issue solved? I experience the same issue in Windows.

[OAN]

I think I found the answer to this. 

Go to the lsdynamsvar.bat file and place the following two into the file:

set "LSTC_LICENSE=ansys"
set "ANSYSLMD_LICENSE_FILE=1055@YourHostName"

[kkuhn3]

Yes this has been solved. I did previously set the environment variables as you suggested. What I was missing was the inclusion of the ansyscl file in the directory the solver is being executed from.