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Simple topology optimization problem fails to run on my machine, no error message

User: "George Lu"
Altair Community Member
Updated by George Lu

I have the following optimization case below, with four fixed supports at one end of the structure and a hole with a downwards force on the other end and design space in red, and as far as I can tell I've followed all the steps in the basic Altair tutorials correctly, but this case does not run on the default optimization settings, and I'm not sure what I'm missing. I've attached the model in question, and was wondering if this could run on anyone else's machine?

image

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    User: "George Lu"
    Altair Community Member
    OP
    Updated by George Lu

    As an addendum, it seems that the tutorial does not run properly on my machine either (I see a red 'x' accompanied by the message that it is 100% done), attached is the file I am using for that

    User: "PaulAltair"
    Altair Employee
    Updated by PaulAltair

    As an addendum, it seems that the tutorial does not run properly on my machine either (I see a red 'x' accompanied by the message that it is 100% done), attached is the file I am using for that

    your stmod you shared is just a block, with no materials, loads, etc

    the tutorial model runs for me ok

    Do you have write permissions in the directory you are trying to use?

    image

    User: "George Lu"
    Altair Community Member
    OP
    Updated by George Lu

    your stmod you shared is just a block, with no materials, loads, etc

    the tutorial model runs for me ok

    Do you have write permissions in the directory you are trying to use?

    image

    Ah my mistake, I've attached the correct file this time. I should have the appropriate write permissions, but the tutorial file is now giving me Optimization Error8106

    User: "PaulAltair"
    Altair Employee
    Updated by PaulAltair

    Ah my mistake, I've attached the correct file this time. I should have the appropriate write permissions, but the tutorial file is now giving me Optimization Error8106

    That model, is exactly the same again as the first one you sent, just a block, nothing else

    User: "George Lu"
    Altair Community Member
    OP
    Updated by George Lu

    That model, is exactly the same again as the first one you sent, just a block, nothing else

    That's odd, apologies. This is a somewhat older version of the model, but hopefully it loads properly?

    User: "PaulAltair"
    Altair Employee
    Updated by PaulAltair

    That's odd, apologies. This is a somewhat older version of the model, but hopefully it loads properly?

    There is no new attachment on this post that I can see?

    User: "George Lu"
    Altair Community Member
    OP
    Updated by George Lu

    There is no new attachment on this post that I can see?

    Should be fixed now

    User: "PaulAltair"
    Altair Employee
    Updated by PaulAltair

    Should be fixed now

    That runs no problem for me with no changes, I can't attach the completed run unfortunately as it bigger than the 15Mb attachment limit

    image

    User: "George Lu"
    Altair Community Member
    OP
    Updated by George Lu

    That runs no problem for me with no changes, I can't attach the completed run unfortunately as it bigger than the 15Mb attachment limit

    image

    I see. Thank you for your time, I'll try and contact support directly to see what technical issues could be preventing me from getting any results. 

    User: "PaulAltair"
    Altair Employee
    Updated by PaulAltair

    I see. Thank you for your time, I'll try and contact support directly to see what technical issues could be preventing me from getting any results. 

    Ok, not sure if you are getting any error messages? 

    fyi it looks more interesting at 15% volfrac

    image

    User: "George Lu"
    Altair Community Member
    OP
    Updated by George Lu

    Ok, not sure if you are getting any error messages? 

    fyi it looks more interesting at 15% volfrac

    image

    Ooh thanks, I'll keep that in mind for the other load cases as well. The error message I get is Optistruct run failed with Error No - 8106 (log file attached). 

    User: "PaulAltair"
    Altair Employee
    Updated by PaulAltair

    Ooh thanks, I'll keep that in mind for the other load cases as well. The error message I get is Optistruct run failed with Error No - 8106 (log file attached). 

    Hmm, that is odd, your progress file is pretty much identical to mine right to the end, except mine runs and yours has the error, the only other reference to that error I can find is another post on here from someone who reported the same error here a couple of weeks ago. I'll let you know if I find anything else.

    User: "George Lu"
    Altair Community Member
    OP
    Updated by George Lu

    Hmm, that is odd, your progress file is pretty much identical to mine right to the end, except mine runs and yours has the error, the only other reference to that error I can find is another post on here from someone who reported the same error here a couple of weeks ago. I'll let you know if I find anything else.

    I see, that certainly is odd. As an aside, thanks for all the help thusfar!

    User: "George Lu"
    Altair Community Member
    OP
    Updated by George Lu

    I see, that certainly is odd. As an aside, thanks for all the help thusfar!

    As an update, for anyone looking up this question in the future, I seem to have found a bandaid solution. I managed to find an out file stating that Inspire wasn't able to write a scratch file, and upon disabling my antivirus, I was able to get a result. 

    User: "George Lu"
    Altair Community Member
    OP
    Updated by George Lu

    As an update, for anyone looking up this question in the future, I seem to have found a bandaid solution. I managed to find an out file stating that Inspire wasn't able to write a scratch file, and upon disabling my antivirus, I was able to get a result. 

    User: "PaulAltair"
    Altair Employee
    Accepted Answer
    Updated by PaulAltair

    As an update, for anyone looking up this question in the future, I seem to have found a bandaid solution. I managed to find an out file stating that Inspire wasn't able to write a scratch file, and upon disabling my antivirus, I was able to get a result. 

    Yes, I have had confirmation that the error is related to inability to write scratch files. Not sure if you can whitelist or something to prevent the AV from blocking it?