[size optimization] *** ERROR # 1859 *** Discrete optimization is not available for topology, topography or free-sizing optimization.

Riccardo Schiesaro
Riccardo Schiesaro New Altair Community Member
edited November 2020 in Community Q&A

Hi every one, 

this is the erorr which appear after I start a size optimization:

*** ERROR # 1859 ***
Discrete optimization is not available for topology, topography or
free-sizing optimization.

I can't understant what this errore is due to, could someone help me? Thanks

 
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Answers

  • Adriano Koga_20259
    Adriano Koga_20259 New Altair Community Member
    edited November 2020

    Hi could you attach the .out file here?

     

    And what exactly is your optimization setup? Can you share a picture of your Model Browser in th Optimization View tab?

    image

  • Riccardo Schiesaro
    Riccardo Schiesaro New Altair Community Member
    edited November 2020
    Adriano Koga_20259 said:

    Hi could you attach the .out file here?

     

    And what exactly is your optimization setup? Can you share a picture of your Model Browser in th Optimization View tab?

    image

    Hi Adriano thanks for the help, I have attached the .out file , and this is the model browser

    image

     

  • Nick Z
    Nick Z
    Altair Employee
    edited February 2021

    Hi,

    From the out file it looks like you have both a topology design domain and sizing optimization design variables. Can you try removing the topology design domain? That should allow the fstosz DVs to work.

    From the .out:
    Total # of topology design elements : 852
    Total # of topology cards : 1
    Total # of user-defined sizing design variables : 32
    Total # of user-defined design variables : 34

  • Riccardo Schiesaro
    Riccardo Schiesaro New Altair Community Member
    edited November 2020
    Nick Z said:

    Hi,

    From the out file it looks like you have both a topology design domain and sizing optimization design variables. Can you try removing the topology design domain? That should allow the fstosz DVs to work.

    From the .out:
    Total # of topology design elements : 852
    Total # of topology cards : 1
    Total # of user-defined sizing design variables : 32
    Total # of user-defined design variables : 34

    HI Nick, thanks a lot for the help.

    I haven't set a topology optimization how it's possible I have a topology variables? I'm trying to remove the topology design domain but the error message is the same. I have attached the model, can you help me to remove it? Thanks

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