OptiStruct stuck on iteration

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

Hello. I've got a relatively simple model which I am running through OptiStruct but it seems to get stuck on an iteration. I've run it several times and it always seems to get stuck on iteration progress 74%.

 

Is there any way I can troubleshoot this?

Tagged:

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015

    Hi,

     

    could you please share the .out file and .stat file?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015
    Altair Forum User said:

    Hi,

     

    could you please share the .out file and .stat file?

     

    Thanks. I've changed the file extensions to .txt to upload them. I should also mention that this happens when I'm trying to perform a topology optimisation.

    Unable to find an attachment - read this blog

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015
    Altair Forum User said:

    Hi,

     

    could you please share the .out file and .stat file?

    Apologies, I uploaded the wrong files. Here are the correct ones.

    Unable to find an attachment - read this blog

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015

    Hi,

     

    I don't see any warning or error message. 

     

    could you please share the model?

     

    We will run at our end and will check whether the same happens?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015
    Altair Forum User said:

    Hi,

     

    I don't see any warning or error message. 

     

    could you please share the model?

     

    We will run at our end and will check whether the same happens?

     

    Yes, there's no error message when I run OptiStruct. It just seems to hang on Iteration #4. I left it running overnight and it was still stuck, so I am a bit concerned.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015

    Thanks, I got the file.

     

    I have removed the hm file from your last post.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015

    Hi,

     

    I think this is because of the mindim size in DTPL card.

     

    can you change the MINDIM in your model?

     

    Help says, It is recommended that a MINDIM value be chosen such that it is at least 3 times, and no greater than 12 times, the average element size.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015
    Altair Forum User said:

    Hi,

     

    I think this is because of the mindim size in DTPL card.

     

    can you change the MINDIM in your model?

     

    Help says, It is recommended that a MINDIM value be chosen such that it is at least 3 times, and no greater than 12 times, the average element size.

     

    Ok, thanks Prakash. I will run it later and see how it goes. Thank again, much appreciated.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015
    Altair Forum User said:

    Hi,

     

    I think this is because of the mindim size in DTPL card.

     

    can you change the MINDIM in your model?

     

    Help says, It is recommended that a MINDIM value be chosen such that it is at least 3 times, and no greater than 12 times, the average element size.

     

    Everything worked. Where did you find the help by the way?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2015

    Hi,

     

    You can find details about DTPL card on OptiStruct reference guide.

Categories