Why do I receive License Manager Error -2?

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When starting MATLAB, I receive the following error:
ERROR: License checkout failed. Invalid license file syntax. License Manager Error -2.

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 30 Aug 2022 at 4:00
Edited: MathWorks Support Team on 31 Aug 2022 at 21:30
This error may be the result of having extra carriage returns in your license file. In order to avoid this, ensure that the following strings all begin on a left justified line:
#, SERVER, DAEMON, or INCREMENT.
Sometimes an INCREMENT line can get wrapped on the end of the preceding INCREMENT line, causing it to be omitted. You may also see this error when the license file has been edited using Microsoft Word or copied without formatting between 2 places. When editing the license file, be sure to use a plain text editor like Notepad, Nano, or TextEdit.
If the license file was emailed to you, try downloading it from the mathworks.com license center if you are able to do so, or have your License Administrator create a new one for you.
If you are unable to correct the problem with the license file, or if you do not see any formatting problems, contact the Installation and Licensing Team by creating a Service Request here:
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More Answers (6)

Mengyao Ruan
Mengyao Ruan on 13 Jan 2016
How should I solve it?
Thanks
  3 Comments
Lubna Shahid
Lubna Shahid on 7 Nov 2016
I have the same error and when I open the license file it is empty. What should I do ?

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mervat mohsen
mervat mohsen on 20 Jun 2016
when i try to open the license file the file written in symbols I can't fix the error please help me

karan Patel
karan Patel on 12 Feb 2017
<<
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My license file is as below and my error is also here. How can i fix it??
  1 Comment
Walter Roberson
Walter Roberson on 12 Feb 2017
You should contact Mathworks for free support on licensing issues (even for R2012a).

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Donát Viosz
Donát Viosz on 12 Oct 2020
On MacOS I just had to run the "Activate.app" inside the Matlab app's package, re-enter my credetials, and the license file got fixed.

Kevin DI LUZIO
Kevin DI LUZIO on 25 Nov 2020
When starting MATLAB, I receive the following error: License Manager Error-2. How can i solve the problem, since i need the software to take a university exam?
  3 Comments
Walter Roberson
Walter Roberson on 19 Mar 2021
If you have control over the system, force it to be deleted. For example you could start Windows CMD in administration mode and delete the file.
If you do not have control over the system, get the administrators to delete the file on the host.

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Mark John Lajera
Mark John Lajera on 21 Oct 2021
how can i get activation key?

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