Why do I receive MathWorks Licensing Error 83?
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MathWorks Support Team
on 3 Sep 2010
Edited: MathWorks Support Team
on 29 Jan 2026 at 18:28
Why do I receive the following error:
MathWorks Licensing Error 83
Your license server is not configured for this release of <PRODUCTNAME>.
Contact your system administrator to update the Network License Manager to the latest release.
Accepted Answer
MathWorks Support Team
on 3 Feb 2026 at 0:00
Edited: MathWorks Support Team
on 29 Jan 2026 at 18:28
This error can occur when the version of the Network License Manager does not support the version of MATLAB you are trying to access.
You will need to make sure the version of the MLM, the vendor daemon, and/or the LMGRD used on the license server is the latest version available. To install the latest version of Network License Manager, you may refer to the following documentation.
Once the vendor daemon and lmgrd is updated, ensure that you have also updated the path to the MLM in the DAEMON line of the license file used on the server.
The license.dat file on the server machine is located in the following location, by default, on Windows:
C:\Program Files\MATLAB\R20XXy\etc
(where R20XXy should be replaced with the release number of MATLAB.)
Note: In order to successfully resolve this error after having downloaded the latest Network License Manager, make sure that the Network License Manager has been started with the updated LMGRD and MLM. It is essential that the Network License Manager is stopped and started again as well as the license.dat updated to point to the correct MLM in order for changes to take effect.
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