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Old   July 2, 2010, 18:19
Post ANSYS Workbench on Linux
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Graf Zahl
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Hello,

I successfully installed ANSYS 12.1.1 on my SLES 10 SP 1 system (64bit Opteron).
I tested the workbench (design modeler (DM) and meshing application) with small test-cases like meshing a cube. It worked well. But then I tried to import a big model from a windows platform (about 10 million elements). The DM worked well but when i tried to mesh it with the meshing application it displayed the following message:

A software execution error occurred inside the mesher. The process suffered an unhandled exception or ran out of usable memory.

Actually, my machine has 64GB memory this should be more than enough
I am afraid the workbench cannot allocate the physical available memory for some reason. Maybe there is a hidden parameter which enables the workbench/mesher to allocate more memory?
Or is there any special procedure to convert workbench models from windows to linux which should be kept in mind? I just copied the files from one system to the other.

By the way, the mesher worked well on the windows platform with a coarse grid. However, for the fine grid i need the big linux machine.

Does anybody experience a similar problem? I appreciate any hint .

Regards,

CPUcruncher

Last edited by CPUcruncher; July 3, 2010 at 08:23. Reason: add more details
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Old   July 3, 2010, 09:51
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sac
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Quote:
Originally Posted by CPUcruncher View Post
Hello,

I successfully installed ANSYS 12.1.1 on my SLES 10 SP 1 system (64bit Opteron).
I tested the workbench (design modeler (DM) and meshing application) with small test-cases like meshing a cube. It worked well. But then I tried to import a big model from a windows platform (about 10 million elements). The DM worked well but when i tried to mesh it with the meshing application it displayed the following message:

A software execution error occurred inside the mesher. The process suffered an unhandled exception or ran out of usable memory.

Actually, my machine has 64GB memory this should be more than enough
I am afraid the workbench cannot allocate the physical available memory for some reason. Maybe there is a hidden parameter which enables the workbench/mesher to allocate more memory?
Or is there any special procedure to convert workbench models from windows to linux which should be kept in mind? I just copied the files from one system to the other.

By the way, the mesher worked well on the windows platform with a coarse grid. However, for the fine grid i need the big linux machine.

Does anybody experience a similar problem? I appreciate any hint .

Regards,

CPUcruncher
Hi,

It can handle 64GB of RAM fine. You need to log a call with support to let them help you work out why it is not working.
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Old   July 3, 2010, 11:40
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Graf Zahl
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Quote:
Originally Posted by sac View Post
Hi,

It can handle 64GB of RAM fine. You need to log a call with support to let them help you work out why it is not working.
Thanks for the quick response. It's good to know that the meshing application has the potential to use 64GB. Have you any experience with SLES? What distribution do you use?

Regards
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Old   July 7, 2010, 04:16
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We tend to use RH5 but I have tried it on Suse and it worked fine.
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Old   July 11, 2010, 09:19
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Graf Zahl
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Hello sac,

thanks again :-) Now it works on my SLES as well. The reason wasn't the memory access but the directory ".ansys" which is located in the home directory. On Unix the workbench stores very large temporary files in ".ansys" and, actually, the available disc space of my home directory was too small. I made a symbolic link to my scratch directory and it worked.

However, the meshing application seems to run slower compared to windows. Did you make similar expericances?

Regards
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