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Fluent crash on starting

    • Omar Zaki
      Subscriber

      I am trying to start Fluent Meshing. Processor is AMD Ryzen Threadripper PRO 7995WX.

       

       

      I get the following error:

      Welcome to ANSYS Fluent 2023 R2

       

      Copyright 1987-2023 ANSYS, Inc. All Rights Reserved.

      Unauthorized use, distribution or duplication is prohibited.

      This product is subject to U.S. laws governing export and re-export.

      For full Legal Notice, see documentation.

       

      Build Time: Aug 18 2023 08:31:10 EDT Build Id: 10213

       

      Connected License Server List: ######

       

      --------------------------------------------------------------

      This is an academic version of ANSYS FLUENT. Usage of this product

      license is limited to the terms and conditions specified in your ANSYS

      license form, additional terms section.

      --------------------------------------------------------------

      Host spawning Node 0 on machine "OmarZaki" (win64).

      [mpiexec@OmarZaki] wmain (mpiexec.c:2165): assert (pg->intel.exitcodes != NULL) failed

      [mpiexec@OmarZaki] HYD_sock_write (..\windows\src\hydra_sock.c:387): write error (errno = 34)

       

       

      What would be the issue?

    • MangeshANSYS
      Ansys Employee

      Hello, 

      Can you please try running using openmpi by selecting openmpi when starting from fluent launcher OR adding the line below to your fluent launch command ? 

      -mpi=openmpi

    • Omar Zaki
      Subscriber

       

      Thanks Mangesh for replying. I tried many things including installing Intel MPI and Microsoft MPI and tried both without any success. I also tried the mpiexec test line

      c:\Program Files\ANSYS Inc\v232\ansys\bin\winx64>ANSYS232.exe -np 2 -mpitest

      but it gave me the same error again:

      [mpiexec@OmarZaki] wmain (mpiexec.c:2165): assert (pg->intel.exitcodes != NULL) failed

      [mpiexec@OmarZaki] HYD_sock_write (..\windows\src\hydra_sock.c:387): write error (errno = 34)

       

      I also tried with Admin Privileges, but also without success. Additionally, I tried both Intel MPI and Microsoft MPI, both failed to launch.

      The only case Fluent launched when I start with one process, since MPI is not needed.

       

      I downgraded to Ansys 2023 R1, and it is working flawlessly now. I think it is a bug with Ansys 2023 R2. I wonder if there is a platform to report bugs like this.

       

    • MangeshANSYS
      Ansys Employee

      please try
      -mpi=intel2018

      It simply could be an issue with combination of your system and newer version of MPI

    • Omar Zaki
      Subscriber

      Still the same error with -mpi=intel2018

      Any other ideas?

    • MangeshANSYS
      Ansys Employee

      wmain (mpiexec.c:2165): assert (pg->intel.exitcodes != NULL) failed
      HYD_sock_write (..\windows\src\hydra_sock.c:387): write error (errno = 34)
      if you are installing MPI services please cache your credentials

      1. See this 3rd party link for similar error 
        https://community.intel.com/t5/Intel-HPC-Toolkit/Intel-MPI-2019-3-can-t-work/m-p/1143101
      2. How is Fluent being launched ? Please try using a directory with write permissions. Use a start in directory without spaces, something like
        C:\temp\fluent_test
      3. In your command line for ansys232, I noticed that you are starting in the Program files directory. Similarly can you try launching from a folder with write permissions ? also try adding 
        -smp
        to your command for launching Ansys Mechanical
      4. are you trying to run on only opne machine or more than one machines ? if more than one then also check firewalls and access to shared drives

      hope this helps

      • Omar Zaki
        Subscriber

        1. See this 3rd party link for similar error 
        https://community.intel.com/t5/Intel-HPC-Toolkit/Intel-MPI-2019-3-can-t-work/m-p/1143101

        Tried the solutions offered on the topic, with no success. I am pretty sure it is an Ansys problem not an MPI problem

        2. How is Fluent being launched ? Please try using a directory with write permissions. Use a start in directory without spaces, something like
        C:\temp\fluent_test

        Tried this, no success. Same Error

        3. In your command line for ansys232, I noticed that you are starting in the Program files directory. Similarly can you try launching from a folder with write permissions ? also try adding 
        -smp to your command for launching Ansys Mechanical

        I am trying to launch Fluent not Ansys Mechanical.

        4. are you trying to run on only opne machine or more than one machines ? if more than one then also check firewalls and access to shared drives

        It is only 1 machine, and I checked the firewall restrictions. There is nothing to be done about it.

         

        Additionally, I tried copying the MPI files from 2023 R1 to the newer versions, without success. I also tried the most recent version 2024 R1, which gave me the same error.

        I am not sure what should be done next. How can I contact customer service about this? (I have a university academic research license)?

         

         

    • MangeshANSYS
      Ansys Employee

      Hello,

      Please reach out to your Ansys Sales Account Manager and reference this thread and my name.

      thank you

    • MangeshANSYS
      Ansys Employee

      Here is what worked for Omar

      "C:\Program Files\ANSYS Inc\v241\fluent\ntbin\win64\fluent.exe" 3d -r24.1.0 -mpi=intel2018 -peth -t6

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