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question on performing modal analysis in OptiStruct

Dear all:

I have a model with plenty of elements (4,383,225) in OptiStruct for modal analysis. And I got the following error, would you please help on how to solve this problem?

Thank you for your help.

*** ERROR # 2005 ***
WIN_IO: WriteFile failed. (112).

****************
Too many error messages. Aborting run.
Current limit is 10000. Use 'MSGLMT' control card to change this value.

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Altair Forum User

Hi @baozaizhang

Looks like there isn't enough disk space.

Could you please check the .out file for information about available and estimated disk space?

Altair Forum User

I am having this same issue when running a frequency response analysis as well. How do I allocate more disk space or reduce the amount of disc space needed?

I am using a tet 10 mesh element size 4 I believe

Unable to find an attachment - read this blog

Altair Forum User

Hi @Ryan JAntsch

WARNING # 1971
Current run is likely to fail due to insufficient disk space.
Estimated disk space requirement = 754746 MB
Estimated disk space available = 98047 MB
Suggestions to reduce disk space requirements:
For static analysis - reduce the number of loadcases.
For eigenvalue/buckling analysis - reduce frequency range in
EIGRL card or number of modes requested.
For FRF analysis - reduce the number of loading frequencies.
For transient analysis - reduce the number of output time steps.

You can redirect the scratch file writing directory to another temporary folder.

Please refer to the post:

https://forum.altairhyperworks.com/index.php?/topic/18600-frf-analysis-error-151/&tab=comments#comment-37700