Why do I receive error 1731 during activation?

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

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 1 Mar 2019
Edited: MathWorks Support Team on 22 Aug 2018
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
  1 Comment
Walter Roberson
Walter Roberson on 31 Jan 2016
Edited: Anthony on 23 Jun 2023
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>

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