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Internal programming error

Hello,

I was trying to run a lattice optimization. Every time I start the 2nd optimization, Optistruct aborts, printing the following message:

*** INTERNAL PROGRAMMING ERROR ***
in file 'appdrv.F', at location # 1016.

**** ABORTING RUN DUE TO AN INTERNAL ERROR ****

Can I somehow fix this?

Hoping for a quick answer,

Julian

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Altair Forum User

Hi Julian,

Not sure what is causing the error,

Is it possible for you to share the .out file and model file with us?

Altair Forum User

Hello Prakash,

I sent the fiels to you via your FileTransferLink. I really hope you can help me.

Greetings,

Altair Forum User

Hi,

There are huge number of design violations written. What changes have you made after 1st phase of optimization?

Altair Forum User

Hi,

I shared a file with you through file transfer link. Please run the same at your end and check if that is through errors.

Altair Forum User

Hi,

There are huge number of design violations written. What changes have you made after 1st phase of optimization?

I think I only changed the objective to minimize mass.

Hi,

I shared a file with you through file transfer link. Please run the same at your end and check if that is through errors.

I am currently testing it. In case it works: what change did you make? I have another optimization with a similar problem.

Greetings and thank you,

Julian

Altair Forum User

Hi,

I shared a file with you through file transfer link. Please run the same at your end and check if that is through errors.

the shared file does work. But I think you chose the wrong stress as a constraint. I noticed that after the optimization and have changed the constraint. The optimization is now still running, but it looks like the contraints will not be met. Ergo, I have to redo the first optimization so that there's less lattice and more solid material. To get it to run, please tell me , what changes you made to the model.

Hopeful greetings,

Julian

Altair Forum User

Hi,

There are two stress responses on same design space and this is the reason for errors. I deleted the duplicated and retained one.