The problem with the license file 28 is that it may not contain the correct information for your network license. This can cause errors such as License checkout failed, License Manager Error -8, or License Manager Error -96. To fix this issue, you need to update or modify your network license file.
How to Update or Modify Your Network License File
To update or modify your network license file, you need to have access to the license server and the original network license file that you received from MathWorks. You also need to know the server host name or IP address, and the port number. The steps are as follows:
Make a backup copy of your current license file 28 and save it in a different location.
Open the original network license file that you received from MathWorks in a text editor. You can find this file in your MathWorks account under the Install and Activate tab of your license.
Copy the SERVER and DAEMON lines from the original network license file and paste them at the beginning of your current license file 28. Make sure to replace the server host name or IP address, and the port number with your own values.
Save and close your modified license file 28.
Restart the network license manager on the server. You can do this by using the lmtools utility on Windows, or by using the lmdown and lmgrd commands on MacOS and Linux.
Verify that your network license is working properly by launching Matlab on a client machine and checking for any errors.
If you still encounter any issues with your network license, you can contact MathWorks support for further assistance.
References
[Where can I find the Activation Key and File Installation Key (FIK) for my license?]
[How do I start or stop the MathWorks Network License Manager?]
[How do I start or stop my Network License Manager on UNIX or Linux?]
[Contact Support]
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