Error # 2126

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi everyone,

 

I using optistruct in order to perform a topology optimization. After 36 iterations the optimization process was terminated and the following error was shown.

The objective function is to minimize the weighted compliance for a certain volume fraction.

 

 *** ERROR # 2126 ***
 Error encountered when writing to the restart file.
      error code = 38

 

Can anyone explain to me to what is error is related to. The results from the optimization process looks alright so far.

Is it related to the mesh? Any feedback would be appreciated.

 

Regards,
Michael

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2018

    Hi Michael,

     

    Looks like a memory issue, Can you share the .out file, please?

     

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2018

    Dear Prakash,

     

    Thanks for your quick reply. Hm, yes maybe that could be the problem which causes the error. During the set-up of the optimization process, I have set the output card param -> checkel -> to no due to a failure in quality element check. I know this is not suggested but I will try to remesh my model to avoid this error. The output file of the run can be found in the link below.

     

     

    Regards,

    Michael

    Unable to find an attachment - read this blog

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2018

    Hi Michael,

     

    As said, the error is because of the insufficient disc space.

     *** WARNING # 1971
     Current run is likely to fail due to insufficient disk space.
     Estimated disk space requirement = 510108 MB
     Estimated disk space available = 22097 MB
      Suggestions to reduce disk space requirements:
     For static analysis - reduce the number of loadcases.
     For eigenvalue/buckling analysis - reduce frequency range in
     EIGRL card or number of modes requested.
     For FRF analysis - reduce the number of loading frequencies.
     For transient analysis - reduce the number of output time steps.

     

    Please use TMPDIR to write scratch files to a separate disc to overcome this issue. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2018

    Dear Prakash,

     

    Thanks for your help, I did not notice that I had insufficient disk space.
    I will increase my disk space and rerun the optimization. Your feedback is really appreciated.

     

    Regards,

    Michael

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2018

    Good Luck..:)/emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'> 

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