Error-Topology Optimization

Hi,

I tried to run the topology optimization of a part using Optistruct it shows the following error

*** ERROR # 9003 ***
FORTRAN CLOSE error.
Closing file: U:/Bau_Teile/Current Working/Current Model/Tetra Elements/Final2.stat with status=delete.
File unit number is 37.
FORTRAN/system error is number 46.

I didn't understand what's the error means. Please help me.

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Altair Forum User

Hi,

Can you move the file to another directory and run the analysis?

Altair Forum User

Hi Praksh,

Thanks for your reply.

I tried as per your suggestion. Now it is working for first order tetra elements.

But, when i try to run the optimization with 2nd order tetra elements it is showing the following error. I have given the Upper limit in Mb= 10000 and even tried with 50000.

*** ERROR # 151 ***
Error accessing the scratch files:
    error encountered in subroutine 'xdslsv'
Solver error no. = -702
             index =   1
    This may be caused by insufficient disk space or some other
    system resource related limitations.
    (e.g. The Operating System or NFS cannot handle file size > 2 GB.)
This error was detected in subroutine prepslv4.

Altair Forum User

Hi,

Please refer to the below post:

http://forum.altairhyperworks.com/index.php?/topic/15161-error-151/#entry25140

Altair Forum User

OptiStruct should run ok under described circumstances, as long as the input file names are different within first 30 characters. You cannot e.g. start the job, then edit the input file and submit next job with the same input file name. Also all explicitly named output files should not be shared.

Altair Forum User

I am working on structure air interface. thank you, the model seems working. still, I am not sure of the results. Is there a solved example that I can use. I tried to access solved example from the site, but in my HYPERMESH, I can't find the example.

Altair Forum User

HI @mosadeq007 I am sorry but I am not sure to which model you are referring. Please let us know which model you are looking for and we will try to share the same. Also you can look for model files@ https://altairuniversity.com/learning-library/?type=learninglibraryitem&search=files&filter_resource_type=&filter_discipline=&filter_language=&filter_source=