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Matlab function

Posted Feb 12, 2014, 8:46 a.m. EST Interfacing, LiveLink for MATLAB Version 4.3a, Version 4.3b 3 Replies

Matthias Ernst
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Hello,
I have a problem with importing matlab-functions in comsol (version 4.3b in Linux). After I have inserted the function name, variables and the range, I get the following error-message: "Matlab function is not found: ..." (see attached file). Maybe the path to the matlab-functions is wrong, can you please help me with this?

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3 Replies Last Post Apr 7, 2014, 3:58 a.m. EDT
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Hello Matthias Ernst

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Jesus Beltran
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Posted: 1 decade ago Apr 4, 2014, 4:23 a.m. EDT
Hello Matthias,
I am having exactly the same problem, but with version 4.3a in Windows.
What is more exasperating is that at the same time, I open the example model "vacuum_flask_llmatlab.mph", I define the functions in Matlab as the pdf file expains and it works fine.
When I define a Matlab function in the model I'm working on and define the function in Matlab exactly in the same way I did with the example, I get the error message you are reporting.
Have you had any luck by now?
Hello Matthias, I am having exactly the same problem, but with version 4.3a in Windows. What is more exasperating is that at the same time, I open the example model "vacuum_flask_llmatlab.mph", I define the functions in Matlab as the pdf file expains and it works fine. When I define a Matlab function in the model I'm working on and define the function in Matlab exactly in the same way I did with the example, I get the error message you are reporting. Have you had any luck by now?
Matthias Ernst
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Posted: 1 decade ago Apr 4, 2014, 7:14 a.m. EDT
Hello Jesus,
now it works. It is very important, that you have saved your Comsol-model in the same path as your Matlab-function, befor you import the Matlab-function to your Comsol-model.
Hello Jesus, now it works. It is very important, that you have saved your Comsol-model in the same path as your Matlab-function, befor you import the Matlab-function to your Comsol-model.
Jesus Beltran
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Posted: 1 decade ago Apr 7, 2014, 3:58 a.m. EDT
Hi Matthias,
Thank you for answering so fast.
I don't know why, but suddenly it started working. I am really not aware of having made any change for this to happen, but it works now.
It makes sense what you say. It is easier to put the files in the same path; however, it seems that this is not really necessary. What is necessary is that Matlab can find your file's function, and this can also be achieved by including in Matlab the path where you put the Matlab files that you work on, no matter where your Comsol file is located. This path can either be Matlab's default or any other you use.
Hi Matthias, Thank you for answering so fast. I don't know why, but suddenly it started working. I am really not aware of having made any change for this to happen, but it works now. It makes sense what you say. It is easier to put the files in the same path; however, it seems that this is not really necessary. What is necessary is that Matlab can find your file's function, and this can also be achieved by including in Matlab the path where you put the Matlab files that you work on, no matter where your Comsol file is located. This path can either be Matlab's default or any other you use.

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