Why do I receive error 1731 during activation?

Why do I receive error 1731 during activation saying "Activations are not allowed when License Management is set to Online Licensing?"

Answer 1

[MathWorks Support Team]

This error occurs when trying to activate a license/trial (e.g. Login Named User Trial) that does not allow activations.

During an install for a Login Named User trial, a license_info.xml file will get created in the user profile for the user performing the install. If the installation was performed under a different user account (e.g. account with Admin rights) then the license_info.xml file, which is required by MATLAB, will only be found by MATLAB when logged into the computer as that user.

To fix this installation:

1. Download the attached license_info.xml from the link below this Answer (Note, if your browser opens the file instead of downloading it, please download the .zip file instead and extract the license_info.xml from it).

2. Place license_info.xml into {matlabroot}/licenses (where {matlabroot} is your MATLAB installation directory):

C:\Program Files\MATLAB\R20XXx\licenses (Windows)

/usr/local/MATLAB/R20XXx/licenses (Linux)

/Applications/MATLAB_R20XXx.app/licenses (macOS) (Right click on the MATLAB application and click show package contents to open the MATLAB_R20XXx.app folder.)

3. Start MATLAB. You should now be prompted to provide your MathWorks Account login information to access your trial.

Alternatively, the "-licmode online" startup flag can be used to start MATLAB in LNU mode without the need for an xml file. To launch MATLAB with a startup flag, open a command prompt/terminal window and enter the path to the MATLAB executable and the “-licmode online” flag.

Windows:

"$MATLAB\bin\win64\MATLAB.exe" -licmode online

Linux or Mac:

./matlab -licmode online

[mirim gamal]

where to find matlabroot if I installed it on mac?

[Walter Roberson]

mirim, it is /Applications/MATLAB_R20XXx.app such as /Applications/MATLAB_R2014a.app

[Guilherme Ost]

I have the same problem. Moreover, I could not download the license_info.xml. Please, could anyone help me out with that?

[Walter Roberson]

Guilherme, you might need to use your browser's "Save Link As" feature.

If that does not work, then copy the below into a file named license_info.xml

<?xml version="1.0" encoding="UTF-8"?>
<root>
    <ActivationEntry hostname="*" idnumber="1"
        matlabroot="*" user="*">
        <licmode>online</licmode>
    </ActivationEntry>
</root>

[Thomas PADIOLEAU]

Hi, I am also using Ubuntu and I have a error message ("An error has occured") when I try to log in. However I have a proxy, is there any modification to make in the .xml file to take it into account ?

Thank you

[Scott]

Hi Thomas,

At this time Login Named User licenses do not support proxy-based authentication. If you need to change your activation type to something that will work behind a proxy, please contact MathWorks support:

http://www.mathworks.com/support/contact_us/

Thanks,

-Scott

MathWorks Installation & Licensing Support

Answer 2

[Ashwani Kumar Jha]

Awesome... it worked

Answer 3

[Misha]

I am also facing same problem and I have tried the license_info.xml way out as suggested by Walter but it didn't work. Plz suggest what else can be done.

[Scott]

Hi Misha,

If you are still unable to launch MATLAB after placing this license_info.xml file in your licenses folder, please contact MathWorks support:

http://www.mathworks.com/support/contact_us/

Thanks,

-Scott

MathWorks Installation & Licensing Support

Answer 4

[Andris Szalai]

Try to type into start: 'Matlab activation', then:

Matlab activation (right click) >> Open file location >> Matlab R2016b

It worked for me. I think the activation was successful, but the icon Matlab didn't show, only the one for the activation, and the error was thrown because I tried to "re-activate" it.

Answer 5

[Simon du Plooy]

I had the same issue, however fix was different. I had a trial license but select the designated user license as opposed to the designated computer license. Mathworks had to change the license and then the activation work. Details: Trial License, Matlab R2016b, Mac OS El Capitan

Answer 6

[GIZEM TERCANLI]

Hi, I am also getting the same error.How can I donwload the license_info.xml as .zip file? Because my browser opens the file directly.

[Walter Roberson]

In most browsers you can right click the link and choose Save As

Answer 7

[Sean Pavlik]

Sorry that I'm not getting this. Do I put the license_info.xml file into the license folder of the matlab application package?

[Walter Roberson]

You put the xml file into the licences (with 's') folder that is directly under the top level MATLAB installation folder.

[Sean Pavlik]

Alright, I did this and was still given the error.

Answer 8

[feili yuan]

I had the same error when I had applied a applicable vision , I chosed the option "Enter the full path to your license file, including the file name "in the login interface and selected license_info(C:\Program Files\MATLAB\R2018a\licenses),then it succeed.

Answer 9

[Sergio Serrano Diaz]

Im having the same problem, cant fix it by any of the options listed, is there any other possible solution?

[Walter Roberson]

Did you try the -licmode online approach?

[Sergio Serrano Diaz]

Yes, i get the following error when trying that approach "MATLAB cannot verify your license rights over the Internet. Activate your software or contact your MATLAB administrator.", then trying to activate i keep getting error 1731 or "The license file selected appears to be invalid" when i enter the path to my license file.

[Walter Roberson]

This 1731 problem can occur in two circumstances.

One of them involves trial licenses, which typically require internet access to validate the trial each time MATLAB is started; at the moment I do not know how licensing is handled for trials that have to be run with no internet connection.

The second circumstance involves Login Named User licensing, which is used with MDCS (Distributed Computing server) and when running MATLAB on cloud services such as Azure or AWS. Not all licenses can use Distributed Computing or cloud services, and even when the license is entitled, there is a special setup step.

Do either of these situations match your case?

[Sergio Serrano Diaz]

Yes, mine is a trial license but i do have an internet connection at all times

[Justin Ghetti]

Hi,

If you are still experiencing this issue, please contact MathWorks support:

http://www.mathworks.com/support/contact_us/

-Justin