How can I run ANSYS from MATLAB？

Question

1 个投票

Hi,

Would you tell me about the cause and solution for stooping of ANSYS run from MATLAB?

I want to run ANSYS from MATLAB, and I tried "Shell Escape Function" (I wrote the DOS comand after "!").

However ANSYS stopped running at the stage of the solution .

It only indicates ANSYS stopped working.

I think DOS command is not wrong, because it run from CMD.exe, and it runs without problems partway.

I suspect the cause is stack overflow, but I do not know how to identify that.

My PC environment is

Windows 7　Enterprise Intel Core i7 970 16.0GB

Truly yours.

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Akash Kunjalwar 2018-3-14

I'm a an undergraduate mechanical engineering student from Osmania University, India. We have to write a code based on calculus in MATLAB and run it in ANSYS APDL as our final project for the course. Please provide the detailed procedure for the same.

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Follow Question

Answer 1

Sarah Palfreyman 2017-1-10

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See ANSYS for the MATLAB AAS Toolbox interface.

http://www.ansys-blog.com/how-to-make-matlab-apps-for-ansys/

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Zhale Davo 2021-5-19

hi sarah

this link went to ansys homepage and nothing else. how can we as students download the matlab aas toolbox? because for downloading it we need to log in on ansys customer portal and if we are using the student version of ansys we do not have access to that toolbox. so how should we run ansys from matlab? is there any other way than the aas toolbox?

SorMun 2023-11-16

The toolbox is now availabe for download from Mathworks File Exchange at

https://www.mathworks.com/matlabcentral/fileexchange/155122-ansys_aas-1-1-13

Thank you

Sorin

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Answer 2

Nicolai Bloch 2015-7-27

编辑：Nicolai Bloch 2015-7-27

在 MATLAB Online 中打开

9 个投票

Hi All

I also had this issue receiving a error return code -1073741571 (alias c00000fd), which is a Windows error code indicating a stack overflow. Since this is really a system level error, ANSYS doesn't produce any error messages in its own log/error file. Support told me that the problem is related to a particular piece of 3rd party software (OpenMP) used by MATLAB. As of 2014b, when running system commands, the stack size is limited to 512k through an environment variable called KMP_STACKSIZE. It is possible to verify the existence and value of this environment variable by issuing the following command listing all the variables (in Windows):

>>System('SET')
    (produces a list of all environment variables currently set...)

For ANSYS to be able to run, you need to increase the stack size before calling the ANSYS executable. You can do this by wrapping the ANSYS call in a batch script or you can do the following:

>>System('SET KMP_STACKSIZE=2048k & "C:\path_to_ansys\ansys[version].exe" [input arguments..]')

I haven't played around with the stack size enough to find a critical value (may also be mesh size/solver dependent). At least the above setting worked for me.

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Jiantao Liu 2019-5-12

Thank you so much, buddy, it is hard to find the sulution for this.

It fixed my problem.

Matlab 2018b + ANSYS R19

"It always return a status or ans =-1.0737e+009"

Davide Clerici 2020-6-5

Worked even for me. Ansys 19.0+MATLAB 2020A. Thank you!!!

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Answer 3

Yusuke 2014-10-27

0 个投票

Thank you for your answer.

I will try if I can not find any other solutions.

However I want to know how to run ANSYS by DOS command and solutions for error.

Because, my program is almost written.

Do you have any other ideas?

Your continued support will be greatly appreciated.

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Answer 4

Ola 2014-11-20

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Hi, i have the exact same problem as you Yusuke. Ansys stops working just as it's about to calculate the solution. The odd thing is that it works perfectly fine if i run my batch file outside of matlab. Sadly I have not yet found the solution for this problem, but was hoping that you could replay the answer if or when you find it. If not, then i'll try to post my solution if i find one, good luck.

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Yusuke 2014-11-21

Hi, thank you for getting touch with me.

I have already cleared my problem.

The cause of my problem was using matlab2014b.

If I use matlab2014a, I can run ANSYS from matlab.

I don't know the exact reason for this problem, however I think matlab2014b has some bugs.

So please try to use matlab 2014a.

I hope this helps you.

Ola 2014-11-23

Ah, thank you man! This really saved me, running it from 2014a worked for me aswell. Thanks for the quick reply :)

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Answer 5

Georg 2015-6-3

在 MATLAB Online 中打开

0 个投票

I can confirm this behavior when running Matlab 2014b and 2015a with any verison of ANSYS. At the same time it works perfectly with Matlab 2013a. That really annoying. I tried two different ways of initiating the Ansys execution:

cmd = sprintf(['"' ansys_path '"' ...
                ' -b' ...
                ' -j ' jobname ...
                ' -i "' skriptFileName '.inp"' ...
                ' -o "' outputFilename '.txt"' ...
                ]);

then:

[o, txt] = system(cmd, '-echo')

... just like:

rt = java.lang.Runtime.getRuntime()
p = rt.exec(cmd)
p.waitFor()

crashes with something I think is a stack overflow.

When running the java-code from e.g. Netbeans (jdk 1.8) it works perfectly. Also the execution from the command prompt works perfectly. So I assume it's definetly a Matlab related problem.

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Georg 2015-6-3

在 MATLAB Online 中打开

FYI:

Problemsignatur:
  Problemereignisname:  APPCRASH
  Anwendungsname:  ANSYS.exe
  Anwendungsversion:  16.0.0.0
  Anwendungszeitstempel:  54808089
  Fehlermodulname:  ANSYS.exe
  Fehlermodulversion:  16.0.0.0
  Fehlermodulzeitstempel:  54808089
  Ausnahmecode:  c00000fd
  Ausnahmeoffset:  0000000007dbfe27
  Betriebsystemversion:  6.1.7601.2.1.0.256.4
  Gebietsschema-ID:  2055
  Zusatzinformation 1:  c516
  Zusatzinformation 2:  c516bfdf78867a45b65f55f9a72f0328
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Nicolai Bloch 2015-12-18

在 MATLAB Online 中打开

As per my original post (above), but using your code instead, this should do the trick:

cmd = sprintf(['SET KMP_STACKSIZE=2048k & "' ansys_path '"' ...
                ' -b' ...
                ' -j ' jobname ...
                ' -i "' skriptFileName '.inp"' ...
                ' -o "' outputFilename '.txt"' ...
                ]);
[o, txt] = system(cmd, '-echo');

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Answer 6

Seth 2016-4-7

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Thank you - this thread was a big help to me several times (I forgot about the problem and rediscovered it a few times) ;-)

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Answer 7

Akshay Kumar 2018-6-13

编辑：Walter Roberson 2018-6-14

0 个投票

Check this out, might be helpful. https://youtu.be/sE3NkH1m24w using MATLAB to run (ANSYS) APDL macro code

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