MATLAB Answers

Yusuke
1

How can I run ANSYS from MATLAB?

Asked by Yusuke
on 27 Oct 2014
Latest activity Commented on by Jiantao Liu on 12 May 2019
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.

  1 Comment

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.

Sign in to comment.

7 Answers

Answer by Sarah Palfreyman on 10 Jan 2017
 Accepted Answer

See ANSYS for the MATLAB AAS Toolbox interface.

  0 Comments

Sign in to comment.


Answer by Nicolai Bloch on 27 Jul 2015
Edited by Nicolai Bloch on 27 Jul 2015

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.

  9 Comments

Hi Nicolai,
I've subscribed especially to be able to write this comment thanking you for your great help. I've tried several ways along many days but this command totally solved the problem.
Many thanks again.
Mohamed Alkalla
Thank you for the video and replying to comments. My concern is about Part 1. I have an ansys apdl code with a large number of nodes and elements. The MATLAB remains on Pause for a while when the ansys gets into the solution, then terminated. I tried the code you suggested as below:
!SET KMP_STACKSIZE=15000M & "C:\Program Files\ANSYS Inc\v161\ansys\bin\winx64\ANSYS161.exe" -b -i Run_1_Test.mac -o Run_1_Test_out.txt
But still having the same issue, while only 50% my computer RAM is in use. I appreciate your help in advance.
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"

Sign in to comment.


Answer by Yusuke
on 27 Oct 2014

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.

  0 Comments

Sign in to comment.


Answer by Ola
on 20 Nov 2014

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.

  2 Comments

Yusuke
on 21 Nov 2014
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
on 23 Nov 2014
Ah, thank you man! This really saved me, running it from 2014a worked for me aswell. Thanks for the quick reply :)

Sign in to comment.


Answer by Georg
on 3 Jun 2015

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.

  2 Comments

Georg
on 3 Jun 2015
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
Zusatzinformation 3: 2abc
Zusatzinformation 4: 2abc3a60b12a51f515354adc2ddacd65
Lesen Sie unsere Datenschutzbestimmungen online:
http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0407
Wenn die Onlinedatenschutzbestimmungen nicht verfügbar sind, lesen Sie unsere Datenschutzbestimmungen offline:
C:\Windows\system32\de-DE\erofflps.txt
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');

Sign in to comment.


Answer by Seth
on 7 Apr 2016

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

  0 Comments

Sign in to comment.


Answer by Akshay Kumar on 13 Jun 2018
Edited by Walter Roberson
on 14 Jun 2018

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

  0 Comments

Sign in to comment.