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[Christoph Hollweck]

Hello,

when I try to start a simulation within a python script, I get an error termination caused by a license problem.

However, I have no problems starting a simulation in the linux terminal with the comand:

~/LSDYNA/Solver/ls-dyna_smp_s_R13_1_0_centos79_intel190/ls-dyna_smp_s_R13_1_0_x64_centos79_ifort190 i=/home/christoph/LSDYNA/LS_Dyna_k_Files/002_sphere_impact_FE/kugel.k ncpu=10 memory=20m

For simplicity, I created a bash file called "Start_sim" to execute this command. So I can start the simulation by only calling the bash file in the terminal with:

bash /home/christoph/LSDYNA/Docs/Start_sim

Now, I am trying to start the Simulation within a Python script. The script is also calling the bash file with:

import subprocess

command = ["bash", "/home/christoph/LSDYNA/Docs/Start_sim.sh"]
subprocess.run(command)

 

So this script should do exactly the same as calling the bash file by hand. However, I get the following error:

*** License problem ***
 Local license:

 *** Error Environment variable LSTC_FILE not set!

 
 *** Error 70022 (OTH+22)

Briefly said, If I call the bash file in the terminal by hand everything works fine, but when I use the python script, a license problem occurs.

I have set the environment variables LSTC_LICENSE_SERVER and LSTC_LICENSE. I tried to create a file called LSTC_FILE containing 

#LICENSE_TYPE: network
#LICENSE_SERVER: corresponding license server

and saved it in usr/local/lstc. But the error still occured. I also created an environment variable called LSTC_FILE containing the path to the file "LSTC_FILE". Still didn't work.

I would be very happy, if anyone could help me or maybe had a similar problem.

Thanks :)

Christoph

 

 

[Christoph Hollweck]

I could find a solution by myself. When you work in a virtual environment (venv), it seems that the environment variables LSTC_LICENSE and LSTC_LICENSE_SERVER are not available in the venv, even though the variables should be defined globally. However, after defining them in the run/debug configurations, the script runs perfectly.

[Aniket Chavan]

Thanks for being proactive and sharing the solution, this will help the others having similar issue!

-Aniket

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